17942243 has 12 divisors (see below), whose sum is σ = 19981920. Its totient is φ = 16096080.

The previous prime is 17942237. The next prime is 17942257. The reversal of 17942243 is 34224971.

It is not a de Polignac number, because 17942243 - 2⁴ = 17942227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17942443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8621 + ... + 10497.

It is an arithmetic number, because the mean of its divisors is an integer number (1665160).

Almost surely, 2^17942243 is an apocalyptic number.

17942243 is a deficient number, since it is larger than the sum of its proper divisors (2039677).

17942243 is a wasteful number, since it uses less digits than its factorization.

17942243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978 (or 1967 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 17942243 is about 4235.8284903900. The cubic root of 17942243 is about 261.7935313704.

The spelling of 17942243 in words is "seventeen million, nine hundred forty-two thousand, two hundred forty-three".