42042904 has 32 divisors (see below), whose sum is σ = 84354480. Its totient is φ = 19574784.

The previous prime is 42042901. The next prime is 42042907. The reversal of 42042904 is 40924024.

It is an interprime number because it is at equal distance from previous prime (42042901) and next prime (42042907).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42042901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11599 + ... + 14785.

Almost surely, 2^42042904 is an apocalyptic number.

It is an amenable number.

42042904 is an abundant number, since it is smaller than the sum of its proper divisors (42311576).

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

42042904 is a wasteful number, since it uses less digits than its factorization.

42042904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307 (or 3303 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 42042904 is about 6484.0499689623. The cubic root of 42042904 is about 347.7209856745.

Adding to 42042904 its reverse (40924024), we get a palindrome (82966928).

The spelling of 42042904 in words is "forty-two million, forty-two thousand, nine hundred four".