240403 has 4 divisors (see below), whose sum is σ = 241488. Its totient is φ = 239320.

The previous prime is 240379. The next prime is 240421. The reversal of 240403 is 304042.

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 is a cyclic number.

It is not a de Polignac number, because 240403 - 2⁵ = 240371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240433) 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, 76 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (60372).

2²⁴⁰⁴⁰³ is an apocalyptic number.

240403 is a deficient number, since it is larger than the sum of its proper divisors (1085).

240403 is an equidigital number, since it uses as much as digits as its factorization.

240403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 240403 is about 490.3090861895. The cubic root of 240403 is about 62.1794144096.

Adding to 240403 its reverse (304042), we get a palindrome (544445).

The spelling of 240403 in words is "two hundred forty thousand, four hundred three", and thus it is an iban number.