12660531 has 16 divisors (see below), whose sum is σ = 18568704. Its totient is φ = 7624224.

The previous prime is 12660523. The next prime is 12660541. The reversal of 12660531 is 13506621.

12660531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12660531 - 2³ = 12660523 is a prime.

It is a super-2 number, since 2×12660531² = 320578090403922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12660541) 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, 1621 + ... + 5286.

It is an arithmetic number, because the mean of its divisors is an integer number (1160544).

Almost surely, 2^12660531 is an apocalyptic number.

12660531 is a deficient number, since it is larger than the sum of its proper divisors (5908173).

12660531 is a wasteful number, since it uses less digits than its factorization.

12660531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 12660531 is about 3558.1639928480. The cubic root of 12660531 is about 233.0687106632.

The spelling of 12660531 in words is "twelve million, six hundred sixty thousand, five hundred thirty-one".