253404 has 18 divisors (see below), whose sum is σ = 640640. Its totient is φ = 84456.

The previous prime is 253387. The next prime is 253417. The reversal of 253404 is 404352.

253404 = T₇ + T₈ + ... + T₁₁₄.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3484 + ... + 3555.

2²⁵³⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

253404 is an abundant number, since it is smaller than the sum of its proper divisors (387236).

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

253404 is a wasteful number, since it uses less digits than its factorization.

253404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7049 (or 7044 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 253404 is about 503.3924910048. The cubic root of 253404 is about 63.2806826195.

Adding to 253404 its reverse (404352), we get a palindrome (657756).

The spelling of 253404 in words is "two hundred fifty-three thousand, four hundred four".