42178879 has 12 divisors (see below), whose sum is σ = 45963840. Its totient is φ = 38659680.

The previous prime is 42178813. The next prime is 42178907. The reversal of 42178879 is 97887124.

It is not a de Polignac number, because 42178879 - 2¹¹ = 42176831 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 (42178379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9307 + ... + 13075.

It is an arithmetic number, because the mean of its divisors is an integer number (3830320).

Almost surely, 2^42178879 is an apocalyptic number.

42178879 is a deficient number, since it is larger than the sum of its proper divisors (3784961).

42178879 is a wasteful number, since it uses less digits than its factorization.

42178879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838 (or 3819 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 42178879 is about 6494.5268495865. The cubic root of 42178879 is about 348.0954482316.

The spelling of 42178879 in words is "forty-two million, one hundred seventy-eight thousand, eight hundred seventy-nine".