125136791 has 4 divisors (see below), whose sum is σ = 134762712. Its totient is φ = 115510872.

The previous prime is 125136787. The next prime is 125136799. The reversal of 125136791 is 197631521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125136791 - 2² = 125136787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125136799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812941 + ... + 4812966.

It is an arithmetic number, because the mean of its divisors is an integer number (33690678).

Almost surely, 2^125136791 is an apocalyptic number.

125136791 is a deficient number, since it is larger than the sum of its proper divisors (9625921).

125136791 is an equidigital number, since it uses as much as digits as its factorization.

125136791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625920.

The product of its digits is 11340, while the sum is 35.

The square root of 125136791 is about 11186.4556942760. The cubic root of 125136791 is about 500.1823215097.

The spelling of 125136791 in words is "one hundred twenty-five million, one hundred thirty-six thousand, seven hundred ninety-one".