12531651 has 16 divisors (see below), whose sum is σ = 18292608. Its totient is φ = 7568000.

The previous prime is 12531647. The next prime is 12531653. The reversal of 12531651 is 15613521.

It is not a de Polignac number, because 12531651 - 2² = 12531647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12531653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12760 + ... + 13706.

It is an arithmetic number, because the mean of its divisors is an integer number (1143288).

Almost surely, 2^12531651 is an apocalyptic number.

12531651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12531651 is a deficient number, since it is larger than the sum of its proper divisors (5760957).

12531651 is a wasteful number, since it uses less digits than its factorization.

12531651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362.

The product of its digits is 900, while the sum is 24.

The square root of 12531651 is about 3540.0072033825. The cubic root of 12531651 is about 232.2751578214.

The spelling of 12531651 in words is "twelve million, five hundred thirty-one thousand, six hundred fifty-one".