81459752 has 16 divisors (see below), whose sum is σ = 166622400. Its totient is φ = 37027120.

The previous prime is 81459737. The next prime is 81459773. The reversal of 81459752 is 25795418.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462752 + ... + 462927.

It is an arithmetic number, because the mean of its divisors is an integer number (10413900).

Almost surely, 2^81459752 is an apocalyptic number.

It is an amenable number.

81459752 is an abundant number, since it is smaller than the sum of its proper divisors (85162648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81459752 is a wasteful number, since it uses less digits than its factorization.

81459752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925696 (or 925692 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 81459752 is about 9025.5056368051. The cubic root of 81459752 is about 433.4919408878.

The spelling of 81459752 in words is "eighty-one million, four hundred fifty-nine thousand, seven hundred fifty-two".