642063250 has 16 divisors (see below), whose sum is σ = 1201942872. Its totient is φ = 256825200.

The previous prime is 642063221. The next prime is 642063269. The reversal of 642063250 is 52360246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 417752721 + 224310529 = 20439^2 + 14977^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283877 + ... + 1284376.

Almost surely, 2^642063250 is an apocalyptic number.

642063250 is a deficient number, since it is larger than the sum of its proper divisors (559879622).

642063250 is a wasteful number, since it uses less digits than its factorization.

642063250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568270 (or 2568260 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 642063250 is about 25338.9670270909. The cubic root of 642063250 is about 862.6989529138.

The spelling of 642063250 in words is "six hundred forty-two million, sixty-three thousand, two hundred fifty".