12725531 has 24 divisors (see below), whose sum is σ = 16303104. Its totient is φ = 9715680.

The previous prime is 12725513. The next prime is 12725551. The reversal of 12725531 is 13552721.

It is not a de Polignac number, because 12725531 - 2⁶ = 12725467 is a prime.

It is a super-2 number, since 2×12725531² = 323878278463922, 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 12725531.

It is not an unprimeable number, because it can be changed into a prime (12725501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36500 + ... + 36846.

It is an arithmetic number, because the mean of its divisors is an integer number (679296).

Almost surely, 2^12725531 is an apocalyptic number.

12725531 is a deficient number, since it is larger than the sum of its proper divisors (3577573).

12725531 is a wasteful number, since it uses less digits than its factorization.

12725531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 398 counting only the distinct ones).

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

The square root of 12725531 is about 3567.2862234477. The cubic root of 12725531 is about 233.4668933769.

The spelling of 12725531 in words is "twelve million, seven hundred twenty-five thousand, five hundred thirty-one".