42182139 has 4 divisors (see below), whose sum is σ = 56242856. Its totient is φ = 28121424.

The previous prime is 42182123. The next prime is 42182209. The reversal of 42182139 is 93128124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42182139 - 2⁴ = 42182123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42182039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7030354 + ... + 7030359.

It is an arithmetic number, because the mean of its divisors is an integer number (14060714).

Almost surely, 2^42182139 is an apocalyptic number.

42182139 is a deficient number, since it is larger than the sum of its proper divisors (14060717).

42182139 is a wasteful number, since it uses less digits than its factorization.

42182139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14060716.

The product of its digits is 3456, while the sum is 30.

The square root of 42182139 is about 6494.7778252993. Note that the first 3 decimals coincide. The cubic root of 42182139 is about 348.1044160843.

The spelling of 42182139 in words is "forty-two million, one hundred eighty-two thousand, one hundred thirty-nine".