84120056 has 8 divisors (see below), whose sum is σ = 157725120. Its totient is φ = 42060024.

The previous prime is 84120031. The next prime is 84120059. The reversal of 84120056 is 65002148.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84120059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257496 + ... + 5257511.

It is an arithmetic number, because the mean of its divisors is an integer number (19715640).

Almost surely, 2^84120056 is an apocalyptic number.

It is an amenable number.

84120056 is a deficient number, since it is larger than the sum of its proper divisors (73605064).

84120056 is a wasteful number, since it uses less digits than its factorization.

84120056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10515013 (or 10515009 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 84120056 is about 9171.6986431086. The cubic root of 84120056 is about 438.1604605192.

The spelling of 84120056 in words is "eighty-four million, one hundred twenty thousand, fifty-six".