12257531 has 8 divisors (see below), whose sum is σ = 14400624. Its totient is φ = 10285920.

The previous prime is 12257521. The next prime is 12257533. The reversal of 12257531 is 13575221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12257531 - 2¹⁴ = 12241147 is a prime.

It is a super-2 number, since 2×12257531² = 300494132431922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12257531.

It is not an unprimeable number, because it can be changed into a prime (12257533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42716 + ... + 43001.

It is an arithmetic number, because the mean of its divisors is an integer number (1800078).

Almost surely, 2^12257531 is an apocalyptic number.

12257531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12257531 is a deficient number, since it is larger than the sum of its proper divisors (2143093).

12257531 is a wasteful number, since it uses less digits than its factorization.

12257531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85741.

The product of its digits is 2100, while the sum is 26.

The square root of 12257531 is about 3501.0756918410. The cubic root of 12257531 is about 230.5690446477.

The spelling of 12257531 in words is "twelve million, two hundred fifty-seven thousand, five hundred thirty-one".