84724581 has 16 divisors (see below), whose sum is σ = 118817280. Its totient is φ = 53626560.

The previous prime is 84724567. The next prime is 84724609. The reversal of 84724581 is 18542748.

It is a happy number.

It is not a de Polignac number, because 84724581 - 2⁹ = 84724069 is a prime.

It is a super-2 number, since 2×84724581² = 14356509251251122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84724511) 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, 3666 + ... + 13523.

It is an arithmetic number, because the mean of its divisors is an integer number (7426080).

Almost surely, 2^84724581 is an apocalyptic number.

It is an amenable number.

84724581 is a deficient number, since it is larger than the sum of its proper divisors (34092699).

84724581 is a wasteful number, since it uses less digits than its factorization.

84724581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17276.

The product of its digits is 71680, while the sum is 39.

The square root of 84724581 is about 9204.5956456544. The cubic root of 84724581 is about 439.2075630082.

The spelling of 84724581 in words is "eighty-four million, seven hundred twenty-four thousand, five hundred eighty-one".