642503250 has 48 divisors (see below), whose sum is σ = 1737334872. Its totient is φ = 171333600.

The previous prime is 642503243. The next prime is 642503269. The reversal of 642503250 is 52305246.

It can be written as a sum of positive squares in 4 ways, for example, as 31573161 + 610930089 = 5619^2 + 24717^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140529 + ... + 145028.

Almost surely, 2^642503250 is an apocalyptic number.

642503250 is an abundant number, since it is smaller than the sum of its proper divisors (1094831622).

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

642503250 is a wasteful number, since it uses less digits than its factorization.

642503250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285580 (or 285567 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 642503250 is about 25347.6478198668. The cubic root of 642503250 is about 862.8959744497.

Adding to 642503250 its reverse (52305246), we get a palindrome (694808496).

The spelling of 642503250 in words is "six hundred forty-two million, five hundred three thousand, two hundred fifty".