42622581 has 4 divisors (see below), whose sum is σ = 56830112. Its totient is φ = 28415052.

The previous prime is 42622579. The next prime is 42622607. The reversal of 42622581 is 18522624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42622581 - 2¹ = 42622579 is a prime.

It is a super-2 number, since 2×42622581² = 3633368822203122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42622501) 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, 7103761 + ... + 7103766.

It is an arithmetic number, because the mean of its divisors is an integer number (14207528).

Almost surely, 2^42622581 is an apocalyptic number.

It is an amenable number.

42622581 is a deficient number, since it is larger than the sum of its proper divisors (14207531).

42622581 is a wasteful number, since it uses less digits than its factorization.

42622581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14207530.

The product of its digits is 7680, while the sum is 30.

The square root of 42622581 is about 6528.5971693772. The cubic root of 42622581 is about 349.3117932408.

The spelling of 42622581 in words is "forty-two million, six hundred twenty-two thousand, five hundred eighty-one".