42118639 has 8 divisors (see below), whose sum is σ = 44664480. Its totient is φ = 39580416.

The previous prime is 42118631. The next prime is 42118663. The reversal of 42118639 is 93681124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42118639 - 2³ = 42118631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42118631) 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, 12787 + ... + 15739.

It is an arithmetic number, because the mean of its divisors is an integer number (5583060).

Almost surely, 2^42118639 is an apocalyptic number.

42118639 is a deficient number, since it is larger than the sum of its proper divisors (2545841).

42118639 is a wasteful number, since it uses less digits than its factorization.

42118639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809.

The product of its digits is 10368, while the sum is 34.

The square root of 42118639 is about 6489.8874412427. The cubic root of 42118639 is about 347.9296522928.

The spelling of 42118639 in words is "forty-two million, one hundred eighteen thousand, six hundred thirty-nine".