253604 has 12 divisors (see below), whose sum is σ = 478044. Its totient is φ = 117024.

The previous prime is 253601. The next prime is 253607. The reversal of 253604 is 406352.

It is an interprime number because it is at equal distance from previous prime (253601) and next prime (253607).

It can be written as a sum of positive squares in 2 ways, for example, as 52900 + 200704 = 230^2 + 448^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253601) 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, 2387 + ... + 2490.

It is an arithmetic number, because the mean of its divisors is an integer number (39837).

2²⁵³⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

253604 is a deficient number, since it is larger than the sum of its proper divisors (224440).

253604 is a wasteful number, since it uses less digits than its factorization.

253604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894 (or 4892 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 253604 is about 503.5911039723. The cubic root of 253604 is about 63.2973264088.

Adding to 253604 its reverse (406352), we get a palindrome (659956).

It can be divided in two parts, 25 and 3604, that multiplied together give a triangular number (90100 = T₄₂₄).

The spelling of 253604 in words is "two hundred fifty-three thousand, six hundred four".