240556 has 6 divisors (see below), whose sum is σ = 420980. Its totient is φ = 120276.

The previous prime is 240551. The next prime is 240571. The reversal of 240556 is 655042.

It is not an unprimeable number, because it can be changed into a prime (240551) 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 as a sum of consecutive naturals, namely, 30066 + ... + 30073.

2²⁴⁰⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

240556 is a deficient number, since it is larger than the sum of its proper divisors (180424).

240556 is a wasteful number, since it uses less digits than its factorization.

240556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60143 (or 60141 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 240556 is about 490.4650854036. The cubic root of 240556 is about 62.1926025880.

Adding to 240556 its reverse (655042), we get a palindrome (895598).

The spelling of 240556 in words is "two hundred forty thousand, five hundred fifty-six".