12925421 has 2 divisors, whose sum is σ = 12925422. Its totient is φ = 12925420.

The previous prime is 12925369. The next prime is 12925441. The reversal of 12925421 is 12452921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11628100 + 1297321 = 3410^2 + 1139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12925421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12925441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6462710 + 6462711.

It is an arithmetic number, because the mean of its divisors is an integer number (6462711).

Almost surely, 2^12925421 is an apocalyptic number.

It is an amenable number.

12925421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12925421 is an equidigital number, since it uses as much as digits as its factorization.

12925421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 12925421 is about 3595.1941533108. The cubic root of 12925421 is about 234.6829646677.

The spelling of 12925421 in words is "twelve million, nine hundred twenty-five thousand, four hundred twenty-one".