12625661 has 2 divisors, whose sum is σ = 12625662. Its totient is φ = 12625660.

The previous prime is 12625651. The next prime is 12625687. The reversal of 12625661 is 16652621.

12625661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7812025 + 4813636 = 2795^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 12625661 - 2¹⁰ = 12624637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12625601) 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, 6312830 + 6312831.

It is an arithmetic number, because the mean of its divisors is an integer number (6312831).

Almost surely, 2^12625661 is an apocalyptic number.

It is an amenable number.

12625661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12625661 is an equidigital number, since it uses as much as digits as its factorization.

12625661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 12625661 is about 3553.2606152659. The cubic root of 12625661 is about 232.8545390596.

The spelling of 12625661 in words is "twelve million, six hundred twenty-five thousand, six hundred sixty-one".