42561416 has 16 divisors (see below), whose sum is σ = 79998540. Its totient is φ = 21228480.

The previous prime is 42561413. The next prime is 42561503. The reversal of 42561416 is 61416524.

It can be written as a sum of positive squares in 2 ways, for example, as 29268100 + 13293316 = 5410^2 + 3646^2 .

It is a super-2 number, since 2×42561416² = 3622948263850112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42561413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2951 + ... + 9686.

Almost surely, 2^42561416 is an apocalyptic number.

It is an amenable number.

42561416 is a deficient number, since it is larger than the sum of its proper divisors (37437124).

42561416 is a wasteful number, since it uses less digits than its factorization.

42561416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064 (or 13060 counting only the distinct ones).

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

The square root of 42561416 is about 6523.9110968805. The cubic root of 42561416 is about 349.1446214142.

The spelling of 42561416 in words is "forty-two million, five hundred sixty-one thousand, four hundred sixteen".