| Base | Representation |
|---|---|
| bin | 100101000000111… |
| … | …1011100111110100 |
| 3 | 10012120002011121100 |
| 4 | 1022001323213310 |
| 5 | 10020424122330 |
| 6 | 323124450100 |
| 7 | 42530666361 |
| oct | 11201734764 |
| 9 | 3176064540 |
| 10 | 1242020340 |
| 11 | 5880a72a0 |
| 12 | 2a7b49930 |
| 13 | 16a4177a2 |
| 14 | bad4b468 |
| 15 | 7408b060 |
| hex | 4a07b9f4 |
1242020340 has 144 divisors (see below), whose sum is σ = 4351838400. Its totient is φ = 283376640.
The previous prime is 1242020333. The next prime is 1242020407. The reversal of 1242020340 is 430202421.
1242020340 is a `hidden beast` number, since 1 + 2 + 420 + 203 + 40 = 666.
1242020340 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×12420203402 = 3085229049947431200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15211 + ... + 52109.
It is an arithmetic number, because the mean of its divisors is an integer number (30221100).
Almost surely, 21242020340 is an apocalyptic number.
1242020340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1242020340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2175919200).
1242020340 is an abundant number, since it is smaller than the sum of its proper divisors (3109818060).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1242020340 is a wasteful number, since it uses less digits than its factorization.
1242020340 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 36942 (or 36937 counting only the distinct ones).
The product of its (nonzero) digits is 384, while the sum is 18.
The square root of 1242020340 is about 35242.3089481946. The cubic root of 1242020340 is about 1074.9202291627.
Adding to 1242020340 its reverse (430202421), we get a palindrome (1672222761).
The spelling of 1242020340 in words is "one billion, two hundred forty-two million, twenty thousand, three hundred forty".
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