243956 has 12 divisors (see below), whose sum is σ = 433440. Its totient is φ = 120120.

The previous prime is 243953. The next prime is 243973. The reversal of 243956 is 659342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243953) 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 3 ways as a sum of consecutive naturals, for example, 146 + ... + 713.

It is an arithmetic number, because the mean of its divisors is an integer number (36120).

2²⁴³⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

243956 is a deficient number, since it is larger than the sum of its proper divisors (189484).

243956 is a wasteful number, since it uses less digits than its factorization.

243956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 932 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 243956 is about 493.9190217030. The cubic root of 243956 is about 62.4842413603.

The spelling of 243956 in words is "two hundred forty-three thousand, nine hundred fifty-six".