240553 has 4 divisors (see below), whose sum is σ = 241668. Its totient is φ = 239440.

The previous prime is 240551. The next prime is 240571. The reversal of 240553 is 355042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 157609 + 82944 = 397^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 240553 - 2¹ = 240551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240553.

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 in 3 ways as a sum of consecutive naturals, for example, 118 + ... + 703.

It is an arithmetic number, because the mean of its divisors is an integer number (60417).

2²⁴⁰⁵⁵³ is an apocalyptic number.

It is an amenable number.

240553 is a deficient number, since it is larger than the sum of its proper divisors (1115).

240553 is an equidigital number, since it uses as much as digits as its factorization.

240553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 240553 is about 490.4620270724. The cubic root of 240553 is about 62.1923440500.

Adding to 240553 its reverse (355042), we get a palindrome (595595).

The spelling of 240553 in words is "two hundred forty thousand, five hundred fifty-three".