642962250 has 96 divisors (see below), whose sum is σ = 1986985728. Its totient is φ = 146959200.

The previous prime is 642962249. The next prime is 642962293. The reversal of 642962250 is 52269246.

642962250 is a `hidden beast` number, since 6 + 4 + 29 + 622 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4662 + ... + 36161.

It is an arithmetic number, because the mean of its divisors is an integer number (20697768).

Almost surely, 2^642962250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642962250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993492864).

642962250 is an abundant number, since it is smaller than the sum of its proper divisors (1344023478).

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

642962250 is a wasteful number, since it uses less digits than its factorization.

642962250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40853 (or 40840 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 642962250 is about 25356.7002979489. The cubic root of 642962250 is about 863.1014078973.

The spelling of 642962250 in words is "six hundred forty-two million, nine hundred sixty-two thousand, two hundred fifty".