42105879 has 8 divisors (see below), whose sum is σ = 62379120. Its totient is φ = 28070568.

The previous prime is 42105863. The next prime is 42105887. The reversal of 42105879 is 97850124.

It is not a de Polignac number, because 42105879 - 2⁴ = 42105863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42105079) 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, 779712 + ... + 779765.

It is an arithmetic number, because the mean of its divisors is an integer number (7797390).

Almost surely, 2^42105879 is an apocalyptic number.

42105879 is a deficient number, since it is larger than the sum of its proper divisors (20273241).

42105879 is a wasteful number, since it uses less digits than its factorization.

42105879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559486 (or 1559480 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42105879 is about 6488.9042988782. The cubic root of 42105879 is about 347.8945132121.

The spelling of 42105879 in words is "forty-two million, one hundred five thousand, eight hundred seventy-nine".