243172 has 6 divisors (see below), whose sum is σ = 425558. Its totient is φ = 121584.

The previous prime is 243167. The next prime is 243197. The reversal of 243172 is 271342.

It can be written as a sum of positive squares in only one way, i.e., 224676 + 18496 = 474^2 + 136^2 .

It is a nialpdrome in base 12.

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 as a sum of consecutive naturals, namely, 30393 + ... + 30400.

2²⁴³¹⁷² is an apocalyptic number.

It is an amenable number.

243172 is a deficient number, since it is larger than the sum of its proper divisors (182386).

243172 is a wasteful number, since it uses less digits than its factorization.

243172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60797 (or 60795 counting only the distinct ones).

The product of its digits is 336, while the sum is 19.

The square root of 243172 is about 493.1247306717. The cubic root of 243172 is about 62.4172344462.

The spelling of 243172 in words is "two hundred forty-three thousand, one hundred seventy-two", and thus it is an iban number.