243874 has 4 divisors (see below), whose sum is σ = 365814. Its totient is φ = 121936.

The previous prime is 243871. The next prime is 243889. The reversal of 243874 is 478342.

243874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478342 = 2 ⋅239171.

It can be written as a sum of positive squares in only one way, i.e., 235225 + 8649 = 485^2 + 93^2 .

It is a d-powerful number, because it can be written as 2¹⁵ + 4⁴ + 8³ + 3¹¹ + 7⁵ + 4⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60967 + ... + 60970.

2²⁴³⁸⁷⁴ is an apocalyptic number.

243874 is a deficient number, since it is larger than the sum of its proper divisors (121940).

243874 is a wasteful number, since it uses less digits than its factorization.

243874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121939.

The product of its digits is 5376, while the sum is 28.

The square root of 243874 is about 493.8360051677. The cubic root of 243874 is about 62.4772397125.

The spelling of 243874 in words is "two hundred forty-three thousand, eight hundred seventy-four".