42561604 has 24 divisors (see below), whose sum is σ = 75660480. Its totient is φ = 20947296.

The previous prime is 42561599. The next prime is 42561611. The reversal of 42561604 is 40616524.

It is a super-2 number, since 2×42561604² = 3622980270105632, which contains 22 as substring.

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, 118377 + ... + 118735.

It is an arithmetic number, because the mean of its divisors is an integer number (3152520).

Almost surely, 2^42561604 is an apocalyptic number.

It is an amenable number.

42561604 is a deficient number, since it is larger than the sum of its proper divisors (33098876).

42561604 is a wasteful number, since it uses less digits than its factorization.

42561604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 42561604 is about 6523.9255053993. The cubic root of 42561604 is about 349.1451354877.

The spelling of 42561604 in words is "forty-two million, five hundred sixty-one thousand, six hundred four".