642862 has 8 divisors (see below), whose sum is σ = 1051992. Its totient is φ = 292200.

The previous prime is 642853. The next prime is 642869. The reversal of 642862 is 268246.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642869) by changing a digit.

642862 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14589 + ... + 14632.

It is an arithmetic number, because the mean of its divisors is an integer number (131499).

2⁶⁴²⁸⁶² is an apocalyptic number.

642862 is a deficient number, since it is larger than the sum of its proper divisors (409130).

642862 is a wasteful number, since it uses less digits than its factorization.

642862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29234.

The product of its digits is 4608, while the sum is 28.

The square root of 642862 is about 801.7867546923. The cubic root of 642862 is about 86.3056547610.

It can be divided in two parts, 64 and 2862, that added together give a triangular number (2926 = T₇₆).

The spelling of 642862 in words is "six hundred forty-two thousand, eight hundred sixty-two".