12510681 has 4 divisors (see below), whose sum is σ = 16680912. Its totient is φ = 8340452.

The previous prime is 12510671. The next prime is 12510713. The reversal of 12510681 is 18601521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18601521 = 3 ⋅6200507.

It is a cyclic number.

It is not a de Polignac number, because 12510681 - 2⁵ = 12510649 is a prime.

It is a super-2 number, since 2×12510681² = 313034278167522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12510611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2085111 + ... + 2085116.

It is an arithmetic number, because the mean of its divisors is an integer number (4170228).

Almost surely, 2^12510681 is an apocalyptic number.

It is an amenable number.

12510681 is a deficient number, since it is larger than the sum of its proper divisors (4170231).

12510681 is an equidigital number, since it uses as much as digits as its factorization.

12510681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170230.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12510681 is about 3537.0441048989. The cubic root of 12510681 is about 232.1455252756.

The spelling of 12510681 in words is "twelve million, five hundred ten thousand, six hundred eighty-one".