253965 has 8 divisors (see below), whose sum is σ = 406368. Its totient is φ = 135440.

The previous prime is 253951. The next prime is 253969. The reversal of 253965 is 569352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253965 - 2⁴ = 253949 is a prime.

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 253965.

It is not an unprimeable number, because it can be changed into a prime (253969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8451 + ... + 8480.

It is an arithmetic number, because the mean of its divisors is an integer number (50796).

2²⁵³⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

253965 is a deficient number, since it is larger than the sum of its proper divisors (152403).

253965 is a wasteful number, since it uses less digits than its factorization.

253965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16939.

The product of its digits is 8100, while the sum is 30.

The square root of 253965 is about 503.9494022221. The cubic root of 253965 is about 63.3273463100.

The spelling of 253965 in words is "two hundred fifty-three thousand, nine hundred sixty-five".