42117180 has 48 divisors (see below), whose sum is σ = 134776320. Its totient is φ = 9626688.

The previous prime is 42117169. The next prime is 42117181. The reversal of 42117180 is 8171124.

It is a self number, because there is not a number n which added to its sum of digits gives 42117180.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 49720 + ... + 50559.

It is an arithmetic number, because the mean of its divisors is an integer number (2807840).

Almost surely, 2^42117180 is an apocalyptic number.

It is an amenable number.

42117180 is an abundant number, since it is smaller than the sum of its proper divisors (92659140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42117180 is a wasteful number, since it uses less digits than its factorization.

42117180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100298 (or 100296 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 42117180 is about 6489.7750346218. The cubic root of 42117180 is about 347.9256347902.

The spelling of 42117180 in words is "forty-two million, one hundred seventeen thousand, one hundred eighty".