42561693 has 24 divisors (see below), whose sum is σ = 67511808. Its totient is φ = 26702784.

The previous prime is 42561679. The next prime is 42561697. The reversal of 42561693 is 39616524.

It is a happy number.

42561693 is a `hidden beast` number, since 4 + 2 + 561 + 6 + 93 = 666.

It is not a de Polignac number, because 42561693 - 2⁴ = 42561677 is a prime.

It is a super-2 number, since 2×42561693² = 3622995422052498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42561697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1021 + ... + 9282.

It is an arithmetic number, because the mean of its divisors is an integer number (2812992).

Almost surely, 2^42561693 is an apocalyptic number.

It is an amenable number.

42561693 is a deficient number, since it is larger than the sum of its proper divisors (24950115).

42561693 is a wasteful number, since it uses less digits than its factorization.

42561693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10335 (or 10323 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 42561693 is about 6523.9323264424. The cubic root of 42561693 is about 349.1453788518.

The spelling of 42561693 in words is "forty-two million, five hundred sixty-one thousand, six hundred ninety-three".