12957475921 has 16 divisors (see below), whose sum is σ = 14179461184. Its totient is φ = 11768099904.

The previous prime is 12957475897. The next prime is 12957475963.

12957475921 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12957475921 - 2¹¹ = 12957473873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12957475981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755386 + ... + 772348.

It is an arithmetic number, because the mean of its divisors is an integer number (886216324).

Almost surely, 2^12957475921 is an apocalyptic number.

It is an amenable number.

12957475921 is a deficient number, since it is larger than the sum of its proper divisors (1221985263).

12957475921 is a wasteful number, since it uses less digits than its factorization.

12957475921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920.

The product of its digits is 1587600, while the sum is 52.

The spelling of 12957475921 in words is "twelve billion, nine hundred fifty-seven million, four hundred seventy-five thousand, nine hundred twenty-one".