256413 has 8 divisors (see below), whose sum is σ = 345088. Its totient is φ = 169344.

The previous prime is 256393. The next prime is 256423. The reversal of 256413 is 314652.

It is a happy number.

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

It is not a de Polignac number, because 256413 - 2⁶ = 256349 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 256413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256423) 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, 45 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (43136).

2²⁵⁶⁴¹³ is an apocalyptic number.

It is an amenable number.

256413 is a deficient number, since it is larger than the sum of its proper divisors (88675).

256413 is a wasteful number, since it uses less digits than its factorization.

256413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its digits is 720, while the sum is 21.

The square root of 256413 is about 506.3723926124. The cubic root of 256413 is about 63.5301693910.

The spelling of 256413 in words is "two hundred fifty-six thousand, four hundred thirteen".