12125657 has 2 divisors, whose sum is σ = 12125658. Its totient is φ = 12125656.

The previous prime is 12125651. The next prime is 12125689. The reversal of 12125657 is 75652121.

12125657 is digitally balanced in base 2, 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., 8549776 + 3575881 = 2924^2 + 1891^2 .

It is a cyclic number.

It is not a de Polignac number, because 12125657 - 2¹⁶ = 12060121 is a prime.

It is not a weakly prime, because it can be changed into another prime (12125651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6062828 + 6062829.

It is an arithmetic number, because the mean of its divisors is an integer number (6062829).

Almost surely, 2^12125657 is an apocalyptic number.

It is an amenable number.

12125657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12125657 is an equidigital number, since it uses as much as digits as its factorization.

12125657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 12125657 is about 3482.1914077201. The cubic root of 12125657 is about 229.7391939766.

Adding to 12125657 its reverse (75652121), we get a palindrome (87777778).

The spelling of 12125657 in words is "twelve million, one hundred twenty-five thousand, six hundred fifty-seven".