42042138 has 64 divisors (see below), whose sum is σ = 91929600. Its totient is φ = 12787200.

The previous prime is 42042109. The next prime is 42042151. The reversal of 42042138 is 83124024.

It is a super-2 number, since 2×42042138² = 3535082735222088, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282088 + ... + 282236.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^42042138 is an apocalyptic number.

42042138 is an abundant number, since it is smaller than the sum of its proper divisors (49887462).

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

42042138 is a wasteful number, since it uses less digits than its factorization.

42042138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 42042138 is about 6483.9909006722. The cubic root of 42042138 is about 347.7188738961.

The spelling of 42042138 in words is "forty-two million, forty-two thousand, one hundred thirty-eight".