642000522 has 16 divisors (see below), whose sum is σ = 1284577632. Its totient is φ = 213904080.

The previous prime is 642000497. The next prime is 642000533. The reversal of 642000522 is 225000246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8808 + ... + 36899.

It is an arithmetic number, because the mean of its divisors is an integer number (80286102).

Almost surely, 2^642000522 is an apocalyptic number.

642000522 is an abundant number, since it is smaller than the sum of its proper divisors (642577110).

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

642000522 is a wasteful number, since it uses less digits than its factorization.

642000522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48053.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 642000522 is about 25337.7292194861. The cubic root of 642000522 is about 862.6708574770.

Adding to 642000522 its reverse (225000246), we get a palindrome (867000768).

The spelling of 642000522 in words is "six hundred forty-two million, five hundred twenty-two", and thus it is an aban number.