243256 has 16 divisors (see below), whose sum is σ = 491400. Its totient is φ = 112224.

The previous prime is 243239. The next prime is 243259. The reversal of 243256 is 652342.

It is a happy number.

It is a d-powerful number, because it can be written as 2⁸ + 4⁴ + 2¹⁶ + 3¹¹ + 5² + 6² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066 + ... + 1273.

2²⁴³²⁵⁶ is an apocalyptic number.

243256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

243256 is an abundant number, since it is smaller than the sum of its proper divisors (248144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243256 is a wasteful number, since it uses less digits than its factorization.

243256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2354 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 243256 is about 493.2098944668. The cubic root of 243256 is about 62.4244206410.

Adding to 243256 its reverse (652342), we get a palindrome (895598).

The spelling of 243256 in words is "two hundred forty-three thousand, two hundred fifty-six".