12508531 has 16 divisors (see below), whose sum is σ = 15022080. Its totient is φ = 10189440.

The previous prime is 12508519. The next prime is 12508537. The reversal of 12508531 is 13580521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12508531 - 2¹⁷ = 12377459 is a prime.

It is a super-2 number, since 2×12508531² = 312926695555922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12508496 and 12508505.

It is not an unprimeable number, because it can be changed into a prime (12508537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12315 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (938880).

Almost surely, 2^12508531 is an apocalyptic number.

12508531 is a deficient number, since it is larger than the sum of its proper divisors (2513549).

12508531 is an equidigital number, since it uses as much as digits as its factorization.

12508531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 12508531 is about 3536.7401657459. The cubic root of 12508531 is about 232.1322262001.

The spelling of 12508531 in words is "twelve million, five hundred eight thousand, five hundred thirty-one".