42511572 has 18 divisors (see below), whose sum is σ = 107459898. Its totient is φ = 14170512.

The previous prime is 42511537. The next prime is 42511589. The reversal of 42511572 is 27511524.

42511572 is a `hidden beast` number, since 42 + 51 + 1 + 572 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40908816 + 1602756 = 6396^2 + 1266^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×42511572² = 3614467507822368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590403 + ... + 590474.

Almost surely, 2^42511572 is an apocalyptic number.

It is an amenable number.

42511572 is an abundant number, since it is smaller than the sum of its proper divisors (64948326).

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

42511572 is a wasteful number, since it uses less digits than its factorization.

42511572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180887 (or 1180882 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 42511572 is about 6520.0898766811. The cubic root of 42511572 is about 349.0082728613.

The spelling of 42511572 in words is "forty-two million, five hundred eleven thousand, five hundred seventy-two".