42561164 has 12 divisors (see below), whose sum is σ = 75703488. Its totient is φ = 20931600.

The previous prime is 42561143. The next prime is 42561187. The reversal of 42561164 is 46116524.

It is a super-2 number, since 2×42561164² = 3622905362069792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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, 86972 + ... + 87459.

It is an arithmetic number, because the mean of its divisors is an integer number (6308624).

Almost surely, 2^42561164 is an apocalyptic number.

It is an amenable number.

42561164 is a deficient number, since it is larger than the sum of its proper divisors (33142324).

42561164 is a wasteful number, since it uses less digits than its factorization.

42561164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174496 (or 174494 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 42561164 is about 6523.8917832840. The cubic root of 42561164 is about 349.1439323345.

Adding to 42561164 its reverse (46116524), we get a palindrome (88677688).

The spelling of 42561164 in words is "forty-two million, five hundred sixty-one thousand, one hundred sixty-four".