42564522 has 128 divisors (see below), whose sum is σ = 120637440. Its totient is φ = 9642240.

The previous prime is 42564521. The next prime is 42564527. The reversal of 42564522 is 22546524.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42564522.

It is not an unprimeable number, because it can be changed into a prime (42564521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113928 + ... + 114300.

It is an arithmetic number, because the mean of its divisors is an integer number (942480).

Almost surely, 2^42564522 is an apocalyptic number.

42564522 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 42564522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60318720).

42564522 is an abundant number, since it is smaller than the sum of its proper divisors (78072918).

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

42564522 is a wasteful number, since it uses less digits than its factorization.

42564522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 19200, while the sum is 30.

The square root of 42564522 is about 6524.1491399262. The cubic root of 42564522 is about 349.1531143711.

It can be divided in two parts, 4256 and 4522, that added together give a palindrome (8778).

The spelling of 42564522 in words is "forty-two million, five hundred sixty-four thousand, five hundred twenty-two".