642002 has 8 divisors (see below), whose sum is σ = 996300. Its totient is φ = 309904.

The previous prime is 641981. The next prime is 642011. The reversal of 642002 is 200246.

It can be written as a sum of positive squares in 2 ways, for example, as 609961 + 32041 = 781^2 + 179^2 .

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

It is an unprimeable number.

642002 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5477 + ... + 5592.

2⁶⁴²⁰⁰² is an apocalyptic number.

642002 is a deficient number, since it is larger than the sum of its proper divisors (354298).

642002 is a wasteful number, since it uses less digits than its factorization.

642002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 642002 is about 801.2502730109. The cubic root of 642002 is about 86.2671519484.

Adding to 642002 its reverse (200246), we get a palindrome (842248).

The spelling of 642002 in words is "six hundred forty-two thousand, two".