81124452 has 36 divisors (see below), whose sum is σ = 215859280. Its totient is φ = 25618032.

The previous prime is 81124451. The next prime is 81124453. The reversal of 81124452 is 25442118.

It is an interprime number because it is at equal distance from previous prime (81124451) and next prime (81124453).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (81124451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58618 + ... + 59985.

Almost surely, 2^81124452 is an apocalyptic number.

It is an amenable number.

81124452 is an abundant number, since it is smaller than the sum of its proper divisors (134734828).

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

81124452 is a wasteful number, since it uses less digits than its factorization.

81124452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118632 (or 118627 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 81124452 is about 9006.9113462940. The cubic root of 81124452 is about 432.8963513342.

The spelling of 81124452 in words is "eighty-one million, one hundred twenty-four thousand, four hundred fifty-two".