84420052 has 6 divisors (see below), whose sum is σ = 147735098. Its totient is φ = 42210024.

The previous prime is 84420019. The next prime is 84420071. The reversal of 84420052 is 25002448.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 84015556 + 404496 = 9166^2 + 636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 84419999 and 84420026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552503 + ... + 10552510.

Almost surely, 2^84420052 is an apocalyptic number.

It is an amenable number.

84420052 is a deficient number, since it is larger than the sum of its proper divisors (63315046).

84420052 is a wasteful number, since it uses less digits than its factorization.

84420052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21105017 (or 21105015 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 84420052 is about 9188.0385284347. The cubic root of 84420052 is about 438.6807107514.

The spelling of 84420052 in words is "eighty-four million, four hundred twenty thousand, fifty-two".