42179861 has 8 divisors (see below), whose sum is σ = 45038400. Its totient is φ = 39406752.

The previous prime is 42179831. The next prime is 42179869. The reversal of 42179861 is 16897124.

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 42179861 - 2¹⁸ = 41917717 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 (42179869) 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, 20336 + ... + 22313.

It is an arithmetic number, because the mean of its divisors is an integer number (5629800).

Almost surely, 2^42179861 is an apocalyptic number.

It is an amenable number.

42179861 is a deficient number, since it is larger than the sum of its proper divisors (2858539).

42179861 is a wasteful number, since it uses less digits than its factorization.

42179861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42715.

The product of its digits is 24192, while the sum is 38.

The square root of 42179861 is about 6494.6024512667. The cubic root of 42179861 is about 348.0981496395.

The spelling of 42179861 in words is "forty-two million, one hundred seventy-nine thousand, eight hundred sixty-one".