| Base | Representation |
|---|---|
| bin | 100001011010100… |
| … | …1101000100011100 |
| 3 | 2220010211001211002 |
| 4 | 1002311031010130 |
| 5 | 4244014242140 |
| 6 | 303132045432 |
| 7 | 36533261153 |
| oct | 10265150434 |
| 9 | 2803731732 |
| 10 | 1121243420 |
| 11 | 525a04860 |
| 12 | 273603878 |
| 13 | 14b3ab05b |
| 14 | a8cac59a |
| 15 | 68680415 |
| hex | 42d4d11c |
1121243420 has 48 divisors (see below), whose sum is σ = 2594150496. Its totient is φ = 403680000.
The previous prime is 1121243413. The next prime is 1121243423. The reversal of 1121243420 is 243421211.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a junction number, because it is equal to n+sod(n) for n = 1121243392 and 1121243401.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1121243423) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3011 + ... + 47450.
It is an arithmetic number, because the mean of its divisors is an integer number (54044802).
Almost surely, 21121243420 is an apocalyptic number.
1121243420 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 1121243420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297075248).
1121243420 is an abundant number, since it is smaller than the sum of its proper divisors (1472907076).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1121243420 is a wasteful number, since it uses less digits than its factorization.
1121243420 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 50582 (or 50580 counting only the distinct ones).
The product of its (nonzero) digits is 384, while the sum is 20.
The square root of 1121243420 is about 33484.9730476224. The cubic root of 1121243420 is about 1038.8829907975.
Adding to 1121243420 its reverse (243421211), we get a palindrome (1364664631).
The spelling of 1121243420 in words is "one billion, one hundred twenty-one million, two hundred forty-three thousand, four hundred twenty".
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