42501522 has 24 divisors (see below), whose sum is σ = 98881776. Its totient is φ = 12143208.

The previous prime is 42501521. The next prime is 42501541. The reversal of 42501522 is 22510524.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (42501521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71988 + ... + 72575.

It is an arithmetic number, because the mean of its divisors is an integer number (4120074).

Almost surely, 2^42501522 is an apocalyptic number.

42501522 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42501522 is an abundant number, since it is smaller than the sum of its proper divisors (56380254).

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

42501522 is a wasteful number, since it uses less digits than its factorization.

42501522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144582 (or 144575 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42501522 is about 6519.3191362289. The cubic root of 42501522 is about 348.9807681184.

The spelling of 42501522 in words is "forty-two million, five hundred one thousand, five hundred twenty-two".