642180252 has 48 divisors (see below), whose sum is σ = 1767729152. Its totient is φ = 177560640.

The previous prime is 642180181. The next prime is 642180257. The reversal of 642180252 is 252081246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642180257) 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, 120703 + ... + 125910.

Almost surely, 2^642180252 is an apocalyptic number.

642180252 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

642180252 is an abundant number, since it is smaller than the sum of its proper divisors (1125548900).

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

642180252 is a wasteful number, since it uses less digits than its factorization.

642180252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246658 (or 246656 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 642180252 is about 25341.2756584983. The cubic root of 642180252 is about 862.7513524099.

The spelling of 642180252 in words is "six hundred forty-two million, one hundred eighty thousand, two hundred fifty-two".