253685 has 8 divisors (see below), whose sum is σ = 307800. Its totient is φ = 200704.

The previous prime is 253681. The next prime is 253703. The reversal of 253685 is 586352.

It can be written as a sum of positive squares in 4 ways, for example, as 676 + 253009 = 26^2 + 503^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 253685 - 2² = 253681 is a prime.

It is a Curzon 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 253685.

It is not an unprimeable number, because it can be changed into a prime (253681) 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, 341 + ... + 789.

It is an arithmetic number, because the mean of its divisors is an integer number (38475).

2²⁵³⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

253685 is a deficient number, since it is larger than the sum of its proper divisors (54115).

253685 is a wasteful number, since it uses less digits than its factorization.

253685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567.

The product of its digits is 7200, while the sum is 29.

The square root of 253685 is about 503.6715199413. The cubic root of 253685 is about 63.3040646538.

The spelling of 253685 in words is "two hundred fifty-three thousand, six hundred eighty-five".