12256531 has 16 divisors (see below), whose sum is σ = 14616000. Its totient is φ = 10055808.

The previous prime is 12256487. The next prime is 12256549. The reversal of 12256531 is 13565221.

12256531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12256531 - 2⁷ = 12256403 is a prime.

It is a super-2 number, since 2×12256531² = 300445104307922, which contains 22 as substring.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 12256496 and 12256505.

It is not an unprimeable number, because it can be changed into a prime (12256571) 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 15 ways as a sum of consecutive naturals, for example, 34945 + ... + 35293.

It is an arithmetic number, because the mean of its divisors is an integer number (913500).

Almost surely, 2^12256531 is an apocalyptic number.

12256531 is a deficient number, since it is larger than the sum of its proper divisors (2359469).

12256531 is a wasteful number, since it uses less digits than its factorization.

12256531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its digits is 1800, while the sum is 25.

The square root of 12256531 is about 3500.9328756776. The cubic root of 12256531 is about 230.5627743443.

The spelling of 12256531 in words is "twelve million, two hundred fifty-six thousand, five hundred thirty-one".