642315502 has 8 divisors (see below), whose sum is σ = 963701712. Its totient is φ = 321081600.

The previous prime is 642315433. The next prime is 642315517. The reversal of 642315502 is 205513246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26874 + ... + 44797.

It is an arithmetic number, because the mean of its divisors is an integer number (120462714).

Almost surely, 2^642315502 is an apocalyptic number.

642315502 is a deficient number, since it is larger than the sum of its proper divisors (321386210).

642315502 is a wasteful number, since it uses less digits than its factorization.

642315502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76154.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 642315502 is about 25343.9440892691. The cubic root of 642315502 is about 862.8119163658.

Adding to 642315502 its reverse (205513246), we get a palindrome (847828748).

The spelling of 642315502 in words is "six hundred forty-two million, three hundred fifteen thousand, five hundred two".