253765 has 4 divisors (see below), whose sum is σ = 304524. Its totient is φ = 203008.

The previous prime is 253763. The next prime is 253769. The reversal of 253765 is 567352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 171396 + 82369 = 414^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 253765 - 2¹ = 253763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253763) 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, 25372 + ... + 25381.

It is an arithmetic number, because the mean of its divisors is an integer number (76131).

2²⁵³⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

253765 is a deficient number, since it is larger than the sum of its proper divisors (50759).

253765 is an equidigital number, since it uses as much as digits as its factorization.

253765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50758.

The product of its digits is 6300, while the sum is 28.

The square root of 253765 is about 503.7509305202. The cubic root of 253765 is about 63.3107183029.

The spelling of 253765 in words is "two hundred fifty-three thousand, seven hundred sixty-five".