125665957 has 2 divisors, whose sum is σ = 125665958. Its totient is φ = 125665956.

The previous prime is 125665933. The next prime is 125665963. The reversal of 125665957 is 759566521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69205761 + 56460196 = 8319^2 + 7514^2 .

It is a cyclic number.

It is not a de Polignac number, because 125665957 - 2¹⁹ = 125141669 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125665907) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62832978 + 62832979.

It is an arithmetic number, because the mean of its divisors is an integer number (62832979).

Almost surely, 2^125665957 is an apocalyptic number.

It is an amenable number.

125665957 is a deficient number, since it is larger than the sum of its proper divisors (1).

125665957 is an equidigital number, since it uses as much as digits as its factorization.

125665957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 46.

The square root of 125665957 is about 11210.0828275263. The cubic root of 125665957 is about 500.8863704331.

The spelling of 125665957 in words is "one hundred twenty-five million, six hundred sixty-five thousand, nine hundred fifty-seven".