253985 has 8 divisors (see below), whose sum is σ = 309120. Its totient is φ = 200304.

The previous prime is 253969. The next prime is 253987. The reversal of 253985 is 589352.

It is a happy number.

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 253985 - 2⁴ = 253969 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253985.

It is not an unprimeable number, because it can be changed into a prime (253987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (38640).

2²⁵³⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

253985 is a deficient number, since it is larger than the sum of its proper divisors (55135).

253985 is an equidigital number, since it uses as much as digits as its factorization.

253985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its digits is 10800, while the sum is 32.

The square root of 253985 is about 503.9692450934. The cubic root of 253985 is about 63.3290086305.

The spelling of 253985 in words is "two hundred fifty-three thousand, nine hundred eighty-five".