42724564 has 12 divisors (see below), whose sum is σ = 75792724. Its totient is φ = 21069504.

The previous prime is 42724531. The next prime is 42724579. The reversal of 42724564 is 46542724.

It can be written as a sum of positive squares in 2 ways, for example, as 34715664 + 8008900 = 5892^2 + 2830^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 72867 + ... + 73450.

Almost surely, 2^42724564 is an apocalyptic number.

It is an amenable number.

42724564 is a deficient number, since it is larger than the sum of its proper divisors (33068160).

42724564 is a wasteful number, since it uses less digits than its factorization.

42724564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146394 (or 146392 counting only the distinct ones).

The product of its digits is 53760, while the sum is 34.

The square root of 42724564 is about 6536.4029863527. The cubic root of 42724564 is about 349.5901706414.

It can be divided in two parts, 4272 and 4564, that added together give a square (8836 = 94²).

The spelling of 42724564 in words is "forty-two million, seven hundred twenty-four thousand, five hundred sixty-four".