42102004 has 24 divisors (see below), whose sum is σ = 86481920. Its totient is φ = 17555616.

The previous prime is 42101993. The next prime is 42102019. The reversal of 42102004 is 40020124.

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, 19284 + ... + 21355.

Almost surely, 2^42102004 is an apocalyptic number.

It is an amenable number.

42102004 is an abundant number, since it is smaller than the sum of its proper divisors (44379916).

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

42102004 is a wasteful number, since it uses less digits than its factorization.

42102004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40687 (or 40685 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42102004 is about 6488.6057053885. The cubic root of 42102004 is about 347.8838406518.

Adding to 42102004 its reverse (40020124), we get a palindrome (82122128).

The spelling of 42102004 in words is "forty-two million, one hundred two thousand, four".