42180999 has 16 divisors (see below), whose sum is σ = 66014208. Its totient is φ = 23451552.

The previous prime is 42180967. The next prime is 42181001. The reversal of 42180999 is 99908124.

It is not a de Polignac number, because 42180999 - 2⁵ = 42180967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42180999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42180959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26367 + ... + 27920.

It is an arithmetic number, because the mean of its divisors is an integer number (4125888).

Almost surely, 2^42180999 is an apocalyptic number.

42180999 is a deficient number, since it is larger than the sum of its proper divisors (23833209).

42180999 is a wasteful number, since it uses less digits than its factorization.

42180999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54334.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 42180999 is about 6494.6900618890. The cubic root of 42180999 is about 348.1012801393.

The spelling of 42180999 in words is "forty-two million, one hundred eighty thousand, nine hundred ninety-nine".