125915173 has 2 divisors, whose sum is σ = 125915174. Its totient is φ = 125915172.

The previous prime is 125915113. The next prime is 125915189. The reversal of 125915173 is 371519521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121154049 + 4761124 = 11007^2 + 2182^2 .

It is a cyclic number.

It is not a de Polignac number, because 125915173 - 2⁹ = 125914661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125915113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62957586 + 62957587.

It is an arithmetic number, because the mean of its divisors is an integer number (62957587).

Almost surely, 2^125915173 is an apocalyptic number.

It is an amenable number.

125915173 is a deficient number, since it is larger than the sum of its proper divisors (1).

125915173 is an equidigital number, since it uses as much as digits as its factorization.

125915173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 34.

The square root of 125915173 is about 11221.1930292639. The cubic root of 125915173 is about 501.2172647946.

The spelling of 125915173 in words is "one hundred twenty-five million, nine hundred fifteen thousand, one hundred seventy-three".