42117185 has 8 divisors (see below), whose sum is σ = 55135296. Its totient is φ = 30630640.

The previous prime is 42117181. The next prime is 42117197. The reversal of 42117185 is 58171124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42117185 - 2² = 42117181 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42117181) 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, 382829 + ... + 382938.

It is an arithmetic number, because the mean of its divisors is an integer number (6891912).

Almost surely, 2^42117185 is an apocalyptic number.

It is an amenable number.

42117185 is a deficient number, since it is larger than the sum of its proper divisors (13018111).

42117185 is a wasteful number, since it uses less digits than its factorization.

42117185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765783.

The product of its digits is 2240, while the sum is 29.

The square root of 42117185 is about 6489.7754198431. The cubic root of 42117185 is about 347.9256485584.

The spelling of 42117185 in words is "forty-two million, one hundred seventeen thousand, one hundred eighty-five".