12625391 has 2 divisors, whose sum is σ = 12625392. Its totient is φ = 12625390.

The previous prime is 12625363. The next prime is 12625429. The reversal of 12625391 is 19352621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12625391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12625331) 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 as a sum of consecutive naturals, namely, 6312695 + 6312696.

It is an arithmetic number, because the mean of its divisors is an integer number (6312696).

Almost surely, 2^12625391 is an apocalyptic number.

12625391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12625391 is an equidigital number, since it uses as much as digits as its factorization.

12625391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 12625391 is about 3553.2226217900. Note that the first 3 decimals coincide. The cubic root of 12625391 is about 232.8528791815.

The spelling of 12625391 in words is "twelve million, six hundred twenty-five thousand, three hundred ninety-one".