12965921425 has 12 divisors (see below), whose sum is σ = 16166575516. Its totient is φ = 10315425600.

The previous prime is 12965921417. The next prime is 12965921447. The reversal of 12965921425 is 52412956921.

It is a Cunningham number, because it is equal to 113868²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 409374289 + 12556547136 = 20233^2 + 112056^2 .

It is not a de Polignac number, because 12965921425 - 2³ = 12965921417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1428174 + ... + 1437223.

Almost surely, 2^12965921425 is an apocalyptic number.

It is an amenable number.

12965921425 is a deficient number, since it is larger than the sum of its proper divisors (3200654091).

12965921425 is a wasteful number, since it uses less digits than its factorization.

12965921425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865588 (or 2865583 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The spelling of 12965921425 in words is "twelve billion, nine hundred sixty-five million, nine hundred twenty-one thousand, four hundred twenty-five".