125711857 has 2 divisors, whose sum is σ = 125711858. Its totient is φ = 125711856.

The previous prime is 125711801. The next prime is 125711869. The reversal of 125711857 is 758117521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85211361 + 40500496 = 9231^2 + 6364^2 .

It is a cyclic number.

It is not a de Polignac number, because 125711857 - 2¹⁵ = 125679089 is a prime.

It is not a weakly prime, because it can be changed into another prime (125712857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62855928 + 62855929.

It is an arithmetic number, because the mean of its divisors is an integer number (62855929).

Almost surely, 2^125711857 is an apocalyptic number.

It is an amenable number.

125711857 is a deficient number, since it is larger than the sum of its proper divisors (1).

125711857 is an equidigital number, since it uses as much as digits as its factorization.

125711857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19600, while the sum is 37.

The square root of 125711857 is about 11212.1299047059. The cubic root of 125711857 is about 500.9473466019.

The spelling of 125711857 in words is "one hundred twenty-five million, seven hundred eleven thousand, eight hundred fifty-seven".