81265112 has 32 divisors (see below), whose sum is σ = 156492000. Its totient is φ = 39546624.

The previous prime is 81265091. The next prime is 81265123. The reversal of 81265112 is 21156218.

Together with 75226888 it forms an amicable pair .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57389 + ... + 58787.

It is an arithmetic number, because the mean of its divisors is an integer number (4890375).

Almost surely, 2^81265112 is an apocalyptic number.

It is an amenable number.

81265112 is a deficient number, since it is larger than the sum of its proper divisors (75226888).

81265112 is a wasteful number, since it uses less digits than its factorization.

81265112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1591 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 81265112 is about 9014.7164126222. The cubic root of 81265112 is about 433.1464035296.

The spelling of 81265112 in words is "eighty-one million, two hundred sixty-five thousand, one hundred twelve".