125731057 has 2 divisors, whose sum is σ = 125731058. Its totient is φ = 125731056.

The previous prime is 125731027. The next prime is 125731079. The reversal of 125731057 is 750137521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 44568976 = 9009^2 + 6676^2 .

It is a cyclic number.

It is not a de Polignac number, because 125731057 - 2¹⁹ = 125206769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125731007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62865528 + 62865529.

It is an arithmetic number, because the mean of its divisors is an integer number (62865529).

Almost surely, 2^125731057 is an apocalyptic number.

It is an amenable number.

125731057 is a deficient number, since it is larger than the sum of its proper divisors (1).

125731057 is an equidigital number, since it uses as much as digits as its factorization.

125731057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 125731057 is about 11212.9860875683. The cubic root of 125731057 is about 500.9728485703.

Adding to 125731057 its reverse (750137521), we get a palindrome (875868578).

The spelling of 125731057 in words is "one hundred twenty-five million, seven hundred thirty-one thousand, fifty-seven".