125400257 has 2 divisors, whose sum is σ = 125400258. Its totient is φ = 125400256.

The previous prime is 125400251. The next prime is 125400269. The reversal of 125400257 is 752004521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114083761 + 11316496 = 10681^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 125400257 - 2¹⁰ = 125399233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125400251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62700128 + 62700129.

It is an arithmetic number, because the mean of its divisors is an integer number (62700129).

Almost surely, 2^125400257 is an apocalyptic number.

It is an amenable number.

125400257 is a deficient number, since it is larger than the sum of its proper divisors (1).

125400257 is an equidigital number, since it uses as much as digits as its factorization.

125400257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 125400257 is about 11198.2256183737. The cubic root of 125400257 is about 500.5331073910.

Adding to 125400257 its reverse (752004521), we get a palindrome (877404778).

The spelling of 125400257 in words is "one hundred twenty-five million, four hundred thousand, two hundred fifty-seven".