42212564 has 12 divisors (see below), whose sum is σ = 78217524. Its totient is φ = 19864704.

The previous prime is 42212551. The next prime is 42212587. The reversal of 42212564 is 46521224.

It can be written as a sum of positive squares in 2 ways, for example, as 14122564 + 28090000 = 3758^2 + 5300^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310319 + ... + 310454.

It is an arithmetic number, because the mean of its divisors is an integer number (6518127).

Almost surely, 2^42212564 is an apocalyptic number.

It is an amenable number.

42212564 is a deficient number, since it is larger than the sum of its proper divisors (36004960).

42212564 is a wasteful number, since it uses less digits than its factorization.

42212564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620794 (or 620792 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 42212564 is about 6497.1196695151. The cubic root of 42212564 is about 348.1880891883.

Adding to 42212564 its reverse (46521224), we get a palindrome (88733788).

The spelling of 42212564 in words is "forty-two million, two hundred twelve thousand, five hundred sixty-four".