642102 has 16 divisors (see below), whose sum is σ = 1297920. Its totient is φ = 211752.

The previous prime is 642079. The next prime is 642113. The reversal of 642102 is 201246.

642102 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.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (81120).

2⁶⁴²¹⁰² is an apocalyptic number.

642102 is an abundant number, since it is smaller than the sum of its proper divisors (655818).

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

642102 is a wasteful number, since it uses less digits than its factorization.

642102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 642102 is about 801.3126730559. The cubic root of 642102 is about 86.2716307856.

Adding to 642102 its reverse (201246), we get a palindrome (843348).

The spelling of 642102 in words is "six hundred forty-two thousand, one hundred two".