125747257 has 2 divisors, whose sum is σ = 125747258. Its totient is φ = 125747256.

The previous prime is 125747239. The next prime is 125747261. The reversal of 125747257 is 752747521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125193721 + 553536 = 11189^2 + 744^2 .

It is an emirp because it is prime and its reverse (752747521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125747257 - 2¹⁵ = 125714489 is a prime.

It is not a weakly prime, because it can be changed into another prime (125747957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62873628 + 62873629.

It is an arithmetic number, because the mean of its divisors is an integer number (62873629).

Almost surely, 2^125747257 is an apocalyptic number.

It is an amenable number.

125747257 is a deficient number, since it is larger than the sum of its proper divisors (1).

125747257 is an equidigital number, since it uses as much as digits as its factorization.

125747257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137200, while the sum is 40.

The square root of 125747257 is about 11213.7084410109. The cubic root of 125747257 is about 500.9943638369.

The spelling of 125747257 in words is "one hundred twenty-five million, seven hundred forty-seven thousand, two hundred fifty-seven".