642802 has 8 divisors (see below), whose sum is σ = 968112. Its totient is φ = 320100.

The previous prime is 642799. The next prime is 642809. The reversal of 642802 is 208246.

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

It is a super-2 number, since 2×642802² = 826388822408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177 + ... + 1147.

It is an arithmetic number, because the mean of its divisors is an integer number (121014).

2⁶⁴²⁸⁰² is an apocalyptic number.

642802 is a deficient number, since it is larger than the sum of its proper divisors (325310).

642802 is a wasteful number, since it uses less digits than its factorization.

642802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 642802 is about 801.7493373867. The cubic root of 642802 is about 86.3029696329.

It can be divided in two parts, 642 and 802, that added together give a square (1444 = 38²).

The spelling of 642802 in words is "six hundred forty-two thousand, eight hundred two".