642108 has 24 divisors (see below), whose sum is σ = 1520848. Its totient is φ = 210816.

The previous prime is 642079. The next prime is 642113. The reversal of 642108 is 801246.

642108 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

642108 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 7 ways as a sum of consecutive naturals, for example, 510 + ... + 1242.

2⁶⁴²¹⁰⁸ is an apocalyptic number.

It is an amenable number.

642108 is an abundant number, since it is smaller than the sum of its proper divisors (878740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642108 is a wasteful number, since it uses less digits than its factorization.

642108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 642108 is about 801.3164169041. The cubic root of 642108 is about 86.2718995010.

The spelling of 642108 in words is "six hundred forty-two thousand, one hundred eight".