81274052 has 12 divisors (see below), whose sum is σ = 146073900. Its totient is φ = 39538656.

The previous prime is 81274049. The next prime is 81274079. The reversal of 81274052 is 25047218.

It can be written as a sum of positive squares in 2 ways, for example, as 47004736 + 34269316 = 6856^2 + 5854^2 .

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, 274427 + ... + 274722.

It is an arithmetic number, because the mean of its divisors is an integer number (12172825).

Almost surely, 2^81274052 is an apocalyptic number.

It is an amenable number.

81274052 is a deficient number, since it is larger than the sum of its proper divisors (64799848).

81274052 is a wasteful number, since it uses less digits than its factorization.

81274052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549190 (or 549188 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 81274052 is about 9015.2122548501. The cubic root of 81274052 is about 433.1622864703.

The spelling of 81274052 in words is "eighty-one million, two hundred seventy-four thousand, fifty-two".