17942172 has 12 divisors (see below), whose sum is σ = 41865096. Its totient is φ = 5980720.

The previous prime is 17942167. The next prime is 17942189. The reversal of 17942172 is 27124971.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 747579 + ... + 747602.

It is an arithmetic number, because the mean of its divisors is an integer number (3488758).

Almost surely, 2^17942172 is an apocalyptic number.

17942172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

17942172 is an abundant number, since it is smaller than the sum of its proper divisors (23922924).

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

17942172 is a wasteful number, since it uses less digits than its factorization.

17942172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495188 (or 1495186 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 17942172 is about 4235.8201094947. The cubic root of 17942172 is about 261.7931860519.

The spelling of 17942172 in words is "seventeen million, nine hundred forty-two thousand, one hundred seventy-two".