243485 has 16 divisors (see below), whose sum is σ = 336960. Its totient is φ = 167040.

The previous prime is 243479. The next prime is 243487. The reversal of 243485 is 584342.

It is not a de Polignac number, because 243485 - 2⁴ = 243469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 929 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (21060).

2²⁴³⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

243485 is a deficient number, since it is larger than the sum of its proper divisors (93475).

243485 is a wasteful number, since it uses less digits than its factorization.

243485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268.

The product of its digits is 3840, while the sum is 26.

The square root of 243485 is about 493.4419925381. The cubic root of 243485 is about 62.4440031780. Note that the first 3 decimals are identical.

It can be divided in two parts, 243 and 485, that multiplied together give a triangular number (117855 = T₄₈₅).

The spelling of 243485 in words is "two hundred forty-three thousand, four hundred eighty-five".