254839 has 4 divisors (see below), whose sum is σ = 274456. Its totient is φ = 235224.

The previous prime is 254833. The next prime is 254857. The reversal of 254839 is 938452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 254839 - 2³ = 254831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 254839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254831) 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, 9789 + ... + 9814.

It is an arithmetic number, because the mean of its divisors is an integer number (68614).

2²⁵⁴⁸³⁹ is an apocalyptic number.

254839 is a deficient number, since it is larger than the sum of its proper divisors (19617).

254839 is a wasteful number, since it uses less digits than its factorization.

254839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19616.

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

The square root of 254839 is about 504.8158079934. The cubic root of 254839 is about 63.3999084476.

The spelling of 254839 in words is "two hundred fifty-four thousand, eight hundred thirty-nine".