253403 has 4 divisors (see below), whose sum is σ = 266760. Its totient is φ = 240048.

The previous prime is 253387. The next prime is 253417. The reversal of 253403 is 304352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253403 - 2⁴ = 253387 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253403.

It is not an unprimeable number, because it can be changed into a prime (253423) 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, 6650 + ... + 6687.

It is an arithmetic number, because the mean of its divisors is an integer number (66690).

2²⁵³⁴⁰³ is an apocalyptic number.

253403 is a deficient number, since it is larger than the sum of its proper divisors (13357).

253403 is a wasteful number, since it uses less digits than its factorization.

253403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13356.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 253403 is about 503.3914977431. The cubic root of 253403 is about 63.2805993786.

Adding to 253403 its reverse (304352), we get a palindrome (557755).

It can be divided in two parts, 253 and 403, that added together give a palindrome (656).

The spelling of 253403 in words is "two hundred fifty-three thousand, four hundred three".