125120891 has 4 divisors (see below), whose sum is σ = 142995312. Its totient is φ = 107246472.

The previous prime is 125120881. The next prime is 125120893. The reversal of 125120891 is 198021521.

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 125120891 - 2²² = 120926587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125120893) 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, 8937200 + ... + 8937213.

It is an arithmetic number, because the mean of its divisors is an integer number (35748828).

Almost surely, 2^125120891 is an apocalyptic number.

125120891 is a deficient number, since it is larger than the sum of its proper divisors (17874421).

125120891 is an equidigital number, since it uses as much as digits as its factorization.

125120891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17874420.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 125120891 is about 11185.7449908354. The cubic root of 125120891 is about 500.1611360648.

The spelling of 125120891 in words is "one hundred twenty-five million, one hundred twenty thousand, eight hundred ninety-one".