| Base | Representation |
|---|---|
| bin | 100100101100100… |
| … | …0010110110111000 |
| 3 | 10011210220121220110 |
| 4 | 1021121002312320 |
| 5 | 10010203131242 |
| 6 | 322103024320 |
| 7 | 42340615650 |
| oct | 11131026670 |
| 9 | 3153817813 |
| 10 | 1231302072 |
| 11 | 582046520 |
| 12 | 2a443b0a0 |
| 13 | 168134010 |
| 14 | b975b360 |
| 15 | 7317039c |
| hex | 49642db8 |
1231302072 has 256 divisors, whose sum is σ = 4180377600. Its totient is φ = 291847680.
The previous prime is 1231302053. The next prime is 1231302073. The reversal of 1231302072 is 2702031321.
It is a super-2 number, since 2×12313020722 = 3032209585022986368, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (21).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1231302073) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2570329 + ... + 2570807.
It is an arithmetic number, because the mean of its divisors is an integer number (16329600).
Almost surely, 21231302072 is an apocalyptic number.
1231302072 is a gapful number since it is divisible by the number (12) 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 1231302072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2090188800).
1231302072 is an abundant number, since it is smaller than the sum of its proper divisors (2949075528).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1231302072 is a wasteful number, since it uses less digits than its factorization.
1231302072 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 626 (or 622 counting only the distinct ones).
The product of its (nonzero) digits is 504, while the sum is 21.
The square root of 1231302072 is about 35089.9141064779. The cubic root of 1231302072 is about 1071.8192105272.
Adding to 1231302072 its reverse (2702031321), we get a palindrome (3933333393).
It can be divided in two parts, 1231 and 302072, that added together give a palindrome (303303).
The spelling of 1231302072 in words is "one billion, two hundred thirty-one million, three hundred two thousand, seventy-two".
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