253565 has 16 divisors (see below), whose sum is σ = 338688. Its totient is φ = 181056.

The previous prime is 253553. The next prime is 253567. The reversal of 253565 is 565352.

It is a cyclic number.

It is not a de Polignac number, because 253565 - 2⁶ = 253501 is a prime.

It is a Duffinian number.

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 253565.

It is not an unprimeable number, because it can be changed into a prime (253567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3014 + ... + 3096.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2²⁵³⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

253565 is a deficient number, since it is larger than the sum of its proper divisors (85123).

253565 is a wasteful number, since it uses less digits than its factorization.

253565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148.

The product of its digits is 4500, while the sum is 26.

The square root of 253565 is about 503.5523805921. The cubic root of 253565 is about 63.2940815569.

It can be divided in two parts, 253 and 565, that added together give a palindrome (818).

The spelling of 253565 in words is "two hundred fifty-three thousand, five hundred sixty-five".