81235074 has 8 divisors (see below), whose sum is σ = 162470160. Its totient is φ = 27078356.

The previous prime is 81235069. The next prime is 81235111. The reversal of 81235074 is 47053218.

It is a sphenic number, since it is the product of 3 distinct primes.

81235074 is an admirable number.

It is a Curzon number.

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, 6769584 + ... + 6769595.

It is an arithmetic number, because the mean of its divisors is an integer number (20308770).

Almost surely, 2^81235074 is an apocalyptic number.

81235074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81235074 is a wasteful number, since it uses less digits than its factorization.

81235074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13539184.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 81235074 is about 9013.0502051192. The cubic root of 81235074 is about 433.0930290259.

The spelling of 81235074 in words is "eighty-one million, two hundred thirty-five thousand, seventy-four".