42179785 has 8 divisors (see below), whose sum is σ = 51571080. Its totient is φ = 33106944.

The previous prime is 42179743. The next prime is 42179801. The reversal of 42179785 is 58797124.

It can be written as a sum of positive squares in 4 ways, for example, as 499849 + 41679936 = 707^2 + 6456^2 .

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 42179785 - 2⁹ = 42179273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79320 + ... + 79849.

It is an arithmetic number, because the mean of its divisors is an integer number (6446385).

Almost surely, 2^42179785 is an apocalyptic number.

It is an amenable number.

42179785 is a deficient number, since it is larger than the sum of its proper divisors (9391295).

42179785 is a wasteful number, since it uses less digits than its factorization.

42179785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159227.

The product of its digits is 141120, while the sum is 43.

The square root of 42179785 is about 6494.5966002516. The cubic root of 42179785 is about 348.0979405708.

The spelling of 42179785 in words is "forty-two million, one hundred seventy-nine thousand, seven hundred eighty-five".