125315257 has 2 divisors, whose sum is σ = 125315258. Its totient is φ = 125315256.

The previous prime is 125315249. The next prime is 125315303. The reversal of 125315257 is 752513521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80478841 + 44836416 = 8971^2 + 6696^2 .

It is a cyclic number.

It is not a de Polignac number, because 125315257 - 2³ = 125315249 is a prime.

It is equal to p_7127059 and since 125315257 and 7127059 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (125315227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62657628 + 62657629.

It is an arithmetic number, because the mean of its divisors is an integer number (62657629).

Almost surely, 2^125315257 is an apocalyptic number.

It is an amenable number.

125315257 is a deficient number, since it is larger than the sum of its proper divisors (1).

125315257 is an equidigital number, since it uses as much as digits as its factorization.

125315257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 31.

The square root of 125315257 is about 11194.4297308974. The cubic root of 125315257 is about 500.4199897851.

Adding to 125315257 its reverse (752513521), we get a palindrome (877828778).

The spelling of 125315257 in words is "one hundred twenty-five million, three hundred fifteen thousand, two hundred fifty-seven".