243475 has 6 divisors (see below), whose sum is σ = 301940. Its totient is φ = 194760.

The previous prime is 243473. The next prime is 243479. The reversal of 243475 is 574342.

It is not a de Polignac number, because 243475 - 2¹ = 243473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 9739 = 243475 / (2 + 4 + 3 + 4 + 7 + 5).

243475 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (243473) 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 5 ways as a sum of consecutive naturals, for example, 4845 + ... + 4894.

2²⁴³⁴⁷⁵ is an apocalyptic number.

243475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243475 is a deficient number, since it is larger than the sum of its proper divisors (58465).

243475 is an equidigital number, since it uses as much as digits as its factorization.

243475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9749 (or 9744 counting only the distinct ones).

The product of its digits is 3360, while the sum is 25.

The square root of 243475 is about 493.4318595308. The cubic root of 243475 is about 62.4431483018.

The spelling of 243475 in words is "two hundred forty-three thousand, four hundred seventy-five".