253705 has 4 divisors (see below), whose sum is σ = 304452. Its totient is φ = 202960.

The previous prime is 253703. The next prime is 253717. The reversal of 253705 is 507352.

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 67081 + 186624 = 259^2 + 432^2 .

It is not a de Polignac number, because 253705 - 2¹ = 253703 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25366 + ... + 25375.

It is an arithmetic number, because the mean of its divisors is an integer number (76113).

2²⁵³⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

253705 is a deficient number, since it is larger than the sum of its proper divisors (50747).

253705 is an equidigital number, since it uses as much as digits as its factorization.

253705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50746.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 253705 is about 503.6913737598. The cubic root of 253705 is about 63.3057281972.

The spelling of 253705 in words is "two hundred fifty-three thousand, seven hundred five".