42621590 has 64 divisors (see below), whose sum is σ = 89579520. Its totient is φ = 14448000.

The previous prime is 42621589. The next prime is 42621611. The reversal of 42621590 is 9512624.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98675 + ... + 99105.

It is an arithmetic number, because the mean of its divisors is an integer number (1399680).

Almost surely, 2^42621590 is an apocalyptic number.

42621590 is an abundant number, since it is smaller than the sum of its proper divisors (46957930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42621590 is a wasteful number, since it uses less digits than its factorization.

42621590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 42621590 is about 6528.5212720799. The cubic root of 42621590 is about 349.3090859851.

The spelling of 42621590 in words is "forty-two million, six hundred twenty-one thousand, five hundred ninety".