81295974 has 20 divisors (see below), whose sum is σ = 182163564. Its totient is φ = 27098604.

The previous prime is 81295931. The next prime is 81295997. The reversal of 81295974 is 47959218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 250752 + ... + 251075.

Almost surely, 2^81295974 is an apocalyptic number.

81295974 is an abundant number, since it is smaller than the sum of its proper divisors (100867590).

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

81295974 is a wasteful number, since it uses less digits than its factorization.

81295974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501841 (or 501832 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 81295974 is about 9016.4280066998. The cubic root of 81295974 is about 433.2012285015.

The spelling of 81295974 in words is "eighty-one million, two hundred ninety-five thousand, nine hundred seventy-four".