642652 has 6 divisors (see below), whose sum is σ = 1124648. Its totient is φ = 321324.

The previous prime is 642623. The next prime is 642673. The reversal of 642652 is 256246.

It is a congruent number.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 80328 + ... + 80335.

2⁶⁴²⁶⁵² is an apocalyptic number.

It is an amenable number.

642652 is a deficient number, since it is larger than the sum of its proper divisors (481996).

642652 is a wasteful number, since it uses less digits than its factorization.

642652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160667 (or 160665 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 642652 is about 801.6557864820. The cubic root of 642652 is about 86.2962560817.

Adding to 642652 its reverse (256246), we get a palindrome (898898).

The spelling of 642652 in words is "six hundred forty-two thousand, six hundred fifty-two".