84120945 has 16 divisors (see below), whose sum is σ = 134957760. Its totient is φ = 44743104.

The previous prime is 84120937. The next prime is 84120973. The reversal of 84120945 is 54902148.

It is not a de Polignac number, because 84120945 - 2³ = 84120937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1714 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (8434860).

Almost surely, 2^84120945 is an apocalyptic number.

It is an amenable number.

84120945 is a deficient number, since it is larger than the sum of its proper divisors (50836815).

84120945 is a wasteful number, since it uses less digits than its factorization.

84120945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15184.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 84120945 is about 9171.7471072855. The cubic root of 84120945 is about 438.1620040405.

The spelling of 84120945 in words is "eighty-four million, one hundred twenty thousand, nine hundred forty-five".