42102844 has 24 divisors (see below), whose sum is σ = 84374528. Its totient is φ = 18007920.

The previous prime is 42102839. The next prime is 42102887. The reversal of 42102844 is 44820124.

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, 16477 + ... + 18859.

Almost surely, 2^42102844 is an apocalyptic number.

It is an amenable number.

42102844 is an abundant number, since it is smaller than the sum of its proper divisors (42271684).

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

42102844 is a wasteful number, since it uses less digits than its factorization.

42102844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025 (or 3023 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 42102844 is about 6488.6704339179. The cubic root of 42102844 is about 347.8861542430.

Adding to 42102844 its reverse (44820124), we get a palindrome (86922968).

The spelling of 42102844 in words is "forty-two million, one hundred two thousand, eight hundred forty-four".