256449 has 8 divisors (see below), whose sum is σ = 346912. Its totient is φ = 168480.

The previous prime is 256441. The next prime is 256469. The reversal of 256449 is 944652.

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

It is not a de Polignac number, because 256449 - 2³ = 256441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256441) 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, 367 + ... + 804.

It is an arithmetic number, because the mean of its divisors is an integer number (43364).

2²⁵⁶⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

256449 is a deficient number, since it is larger than the sum of its proper divisors (90463).

256449 is a wasteful number, since it uses less digits than its factorization.

256449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247.

The product of its digits is 8640, while the sum is 30.

The square root of 256449 is about 506.4079383264. The cubic root of 256449 is about 63.5331424320.

The spelling of 256449 in words is "two hundred fifty-six thousand, four hundred forty-nine".