642252502 has 16 divisors (see below), whose sum is σ = 998049600. Its totient is φ = 309601600.

The previous prime is 642252493. The next prime is 642252517. The reversal of 642252502 is 205252246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34002 + ... + 49402.

It is an arithmetic number, because the mean of its divisors is an integer number (62378100).

Almost surely, 2^642252502 is an apocalyptic number.

642252502 is a deficient number, since it is larger than the sum of its proper divisors (355797098).

642252502 is a wasteful number, since it uses less digits than its factorization.

642252502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16151.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 642252502 is about 25342.7011583217. The cubic root of 642252502 is about 862.7837064867.

The spelling of 642252502 in words is "six hundred forty-two million, two hundred fifty-two thousand, five hundred two".