6256399 has 4 divisors (see below), whose sum is σ = 6270264. Its totient is φ = 6242536.

The previous prime is 6256381. The next prime is 6256409. The reversal of 6256399 is 9936526.

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 6256399 - 2²¹ = 4159247 is a prime.

It is a Smith number, since the sum of its digits (40) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6256309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6232 + ... + 7165.

It is an arithmetic number, because the mean of its divisors is an integer number (1567566).

Almost surely, 2^6256399 is an apocalyptic number.

6256399 is a deficient number, since it is larger than the sum of its proper divisors (13865).

6256399 is a wasteful number, since it uses less digits than its factorization.

6256399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13864.

The product of its digits is 87480, while the sum is 40.

The square root of 6256399 is about 2501.2794725900. The cubic root of 6256399 is about 184.2644178034.

The spelling of 6256399 in words is "six million, two hundred fifty-six thousand, three hundred ninety-nine".