125770857 has 4 divisors (see below), whose sum is σ = 167694480. Its totient is φ = 83847236.

The previous prime is 125770819. The next prime is 125770867. The reversal of 125770857 is 758077521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 758077521 = 3 ⋅252692507.

It is a cyclic number.

It is not a de Polignac number, because 125770857 - 2²³ = 117382249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125770817) 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 in 3 ways as a sum of consecutive naturals, for example, 20961807 + ... + 20961812.

It is an arithmetic number, because the mean of its divisors is an integer number (41923620).

Almost surely, 2^125770857 is an apocalyptic number.

It is an amenable number.

125770857 is a deficient number, since it is larger than the sum of its proper divisors (41923623).

125770857 is an equidigital number, since it uses as much as digits as its factorization.

125770857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41923622.

The product of its (nonzero) digits is 137200, while the sum is 42.

The square root of 125770857 is about 11214.7606751103. The cubic root of 125770857 is about 501.0257037581.

The spelling of 125770857 in words is "one hundred twenty-five million, seven hundred seventy thousand, eight hundred fifty-seven".