120045891 has 16 divisors (see below), whose sum is σ = 193688064. Its totient is φ = 64562304.

The previous prime is 120045883. The next prime is 120045899. The reversal of 120045891 is 198540021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120045883) and next prime (120045899).

It is not a de Polignac number, because 120045891 - 2³ = 120045883 is a prime.

It is a super-2 number, since 2×120045891² = 28822031891967762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120045899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167775 + ... + 168488.

It is an arithmetic number, because the mean of its divisors is an integer number (12105504).

Almost surely, 2^120045891 is an apocalyptic number.

120045891 is a deficient number, since it is larger than the sum of its proper divisors (73642173).

120045891 is a wasteful number, since it uses less digits than its factorization.

120045891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336290.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 120045891 is about 10956.5455778726. The cubic root of 120045891 is about 493.3052829295.

The spelling of 120045891 in words is "one hundred twenty million, forty-five thousand, eight hundred ninety-one".