125775457 has 2 divisors, whose sum is σ = 125775458. Its totient is φ = 125775456.

The previous prime is 125775439. The next prime is 125775487. The reversal of 125775457 is 754577521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 2143296 = 11119^2 + 1464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125775457 is a prime.

It is not a weakly prime, because it can be changed into another prime (125775437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62887728 + 62887729.

It is an arithmetic number, because the mean of its divisors is an integer number (62887729).

Almost surely, 2^125775457 is an apocalyptic number.

It is an amenable number.

125775457 is a deficient number, since it is larger than the sum of its proper divisors (1).

125775457 is an equidigital number, since it uses as much as digits as its factorization.

125775457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 343000, while the sum is 43.

The square root of 125775457 is about 11214.9657600904. The cubic root of 125775457 is about 501.0318119303.

The spelling of 125775457 in words is "one hundred twenty-five million, seven hundred seventy-five thousand, four hundred fifty-seven".