42102 has 12 divisors (see below), whose sum is σ = 91260. Its totient is φ = 14028.

The previous prime is 42101. The next prime is 42131. The reversal of 42102 is 20124.

42102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1152 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (7605).

2⁴²¹⁰² is an apocalyptic number.

42102 is an abundant number, since it is smaller than the sum of its proper divisors (49158).

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

42102 is a wasteful number, since it uses less digits than its factorization.

42102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 42102 is about 205.1877189307. The cubic root of 42102 is about 34.7883829635.

Adding to 42102 its reverse (20124), we get a palindrome (62226).

It can be divided in two parts, 42 and 102, that added together give a square (144 = 12²).

The spelling of 42102 in words is "forty-two thousand, one hundred two", and thus it is an iban number.