642952 has 8 divisors (see below), whose sum is σ = 1205550. Its totient is φ = 321472.

The previous prime is 642947. The next prime is 642953. The reversal of 642952 is 259246.

642952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 86436 = 746^2 + 294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 642952.

It is not an unprimeable number, because it can be changed into a prime (642953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40177 + ... + 40192.

2⁶⁴²⁹⁵² is an apocalyptic number.

It is an amenable number.

642952 is a deficient number, since it is larger than the sum of its proper divisors (562598).

642952 is a wasteful number, since it uses less digits than its factorization.

642952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80375 (or 80371 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 642952 is about 801.8428773769. The cubic root of 642952 is about 86.3096821399.

The spelling of 642952 in words is "six hundred forty-two thousand, nine hundred fifty-two".