12925551 has 4 divisors (see below), whose sum is σ = 17234072. Its totient is φ = 8617032.

The previous prime is 12925531. The next prime is 12925579. The reversal of 12925551 is 15552921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15552921 = 3 ⋅5184307.

It is not a de Polignac number, because 12925551 - 2⁵ = 12925519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12925501) 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, 2154256 + ... + 2154261.

It is an arithmetic number, because the mean of its divisors is an integer number (4308518).

Almost surely, 2^12925551 is an apocalyptic number.

12925551 is a deficient number, since it is larger than the sum of its proper divisors (4308521).

12925551 is an equidigital number, since it uses as much as digits as its factorization.

12925551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308520.

The product of its digits is 4500, while the sum is 30.

The square root of 12925551 is about 3595.2122329565. The cubic root of 12925551 is about 234.6837514553.

The spelling of 12925551 in words is "twelve million, nine hundred twenty-five thousand, five hundred fifty-one".