42417879 has 24 divisors (see below), whose sum is σ = 66465648. Its totient is φ = 23990400.

The previous prime is 42417871. The next prime is 42417887. The reversal of 42417879 is 97871424.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42417871) and next prime (42417887).

It is not a de Polignac number, because 42417879 - 2³ = 42417871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42417879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42417871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13419 + ... + 16275.

It is an arithmetic number, because the mean of its divisors is an integer number (2769402).

Almost surely, 2^42417879 is an apocalyptic number.

42417879 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

42417879 is a deficient number, since it is larger than the sum of its proper divisors (24047769).

42417879 is a wasteful number, since it uses less digits than its factorization.

42417879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975 (or 2968 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 42417879 is about 6512.9009665432. The cubic root of 42417879 is about 348.7516863782.

The spelling of 42417879 in words is "forty-two million, four hundred seventeen thousand, eight hundred seventy-nine".