42172177 has 8 divisors (see below), whose sum is σ = 43727400. Its totient is φ = 40623744.

The previous prime is 42172171. The next prime is 42172187. The reversal of 42172177 is 77127124.

42172177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15968016 + 26204161 = 3996^2 + 5119^2 .

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 42172177 - 2⁷ = 42172049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42172171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13333 + ... + 16189.

It is an arithmetic number, because the mean of its divisors is an integer number (5465925).

Almost surely, 2^42172177 is an apocalyptic number.

It is an amenable number.

42172177 is a deficient number, since it is larger than the sum of its proper divisors (1555223).

42172177 is a wasteful number, since it uses less digits than its factorization.

42172177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its digits is 5488, while the sum is 31.

The square root of 42172177 is about 6494.0108561659. The cubic root of 42172177 is about 348.0770104153.

The spelling of 42172177 in words is "forty-two million, one hundred seventy-two thousand, one hundred seventy-seven".