125801911 has 2 divisors, whose sum is σ = 125801912. Its totient is φ = 125801910.

The previous prime is 125801873. The next prime is 125801969. The reversal of 125801911 is 119108521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125801911 - 2⁷ = 125801783 is a prime.

It is a super-2 number, since 2×125801911² = 31652241622503842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125801911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125808911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62900955 + 62900956.

It is an arithmetic number, because the mean of its divisors is an integer number (62900956).

Almost surely, 2^125801911 is an apocalyptic number.

125801911 is a deficient number, since it is larger than the sum of its proper divisors (1).

125801911 is an equidigital number, since it uses as much as digits as its factorization.

125801911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 125801911 is about 11216.1451042682. The cubic root of 125801911 is about 501.0669363410.

The spelling of 125801911 in words is "one hundred twenty-five million, eight hundred one thousand, nine hundred eleven".