42621579 has 128 divisors (see below), whose sum is σ = 90316800. Its totient is φ = 19128960.

The previous prime is 42621569. The next prime is 42621583. The reversal of 42621579 is 97512624.

It is not a de Polignac number, because 42621579 - 2⁵ = 42621547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42621529) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 513472 + ... + 513554.

It is an arithmetic number, because the mean of its divisors is an integer number (705600).

Almost surely, 2^42621579 is an apocalyptic number.

42621579 is an abundant number, since it is smaller than the sum of its proper divisors (47695221).

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

42621579 is a wasteful number, since it uses less digits than its factorization.

42621579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 136 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 42621579 is about 6528.5204296226. The cubic root of 42621579 is about 349.3090559346.

The spelling of 42621579 in words is "forty-two million, six hundred twenty-one thousand, five hundred seventy-nine".