642057252 has 48 divisors (see below), whose sum is σ = 1537062912. Its totient is φ = 208484640.

The previous prime is 642057239. The next prime is 642057257. The reversal of 642057252 is 252750246.

It is not an unprimeable number, because it can be changed into a prime (642057257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220953 + ... + 223839.

It is an arithmetic number, because the mean of its divisors is an integer number (32022144).

Almost surely, 2^642057252 is an apocalyptic number.

It is an amenable number.

642057252 is an abundant number, since it is smaller than the sum of its proper divisors (895005660).

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

642057252 is a wasteful number, since it uses less digits than its factorization.

642057252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368 (or 3366 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 642057252 is about 25338.8486715557. The cubic root of 642057252 is about 862.6962665302.

The spelling of 642057252 in words is "six hundred forty-two million, fifty-seven thousand, two hundred fifty-two".