243854 has 16 divisors (see below), whose sum is σ = 402192. Its totient is φ = 110208.

The previous prime is 243851. The next prime is 243857. The reversal of 243854 is 458342.

It is an interprime number because it is at equal distance from previous prime (243851) and next prime (243857).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243854.

It is not an unprimeable number, because it can be changed into a prime (243851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2102 + ... + 2214.

It is an arithmetic number, because the mean of its divisors is an integer number (25137).

2²⁴³⁸⁵⁴ is an apocalyptic number.

243854 is a deficient number, since it is larger than the sum of its proper divisors (158338).

243854 is a wasteful number, since it uses less digits than its factorization.

243854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211.

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

The square root of 243854 is about 493.8157551152. The cubic root of 243854 is about 62.4755317555.

It can be divided in two parts, 24385 and 4, that added together give a cube (24389 = 29³).

The spelling of 243854 in words is "two hundred forty-three thousand, eight hundred fifty-four".