253849 has 4 divisors (see below), whose sum is σ = 256564. Its totient is φ = 251136.

The previous prime is 253823. The next prime is 253853. The reversal of 253849 is 948352.

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 196249 + 57600 = 443^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 253849 - 2¹⁷ = 122777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253849.

It is not an unprimeable number, because it can be changed into a prime (253819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212 + ... + 1405.

It is an arithmetic number, because the mean of its divisors is an integer number (64141).

2²⁵³⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

253849 is a deficient number, since it is larger than the sum of its proper divisors (2715).

253849 is an equidigital number, since it uses as much as digits as its factorization.

253849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714.

The product of its digits is 8640, while the sum is 31.

The square root of 253849 is about 503.8342981576. The cubic root of 253849 is about 63.3177031297.

The spelling of 253849 in words is "two hundred fifty-three thousand, eight hundred forty-nine".