5256399 has 8 divisors (see below), whose sum is σ = 7076992. Its totient is φ = 3470040.

The previous prime is 5256389. The next prime is 5256401. The reversal of 5256399 is 9936525.

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

It is not a de Polignac number, because 5256399 - 2⁵ = 5256367 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 5⁴ + 2⁴ + 5⁶ + 6⁷ + 3¹¹ + 9² + 9⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5256319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8197 + ... + 8814.

It is an arithmetic number, because the mean of its divisors is an integer number (884624).

Almost surely, 2^5256399 is an apocalyptic number.

5256399 is a deficient number, since it is larger than the sum of its proper divisors (1820593).

5256399 is a wasteful number, since it uses less digits than its factorization.

5256399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17117.

The product of its digits is 72900, while the sum is 39.

The square root of 5256399 is about 2292.6837985209. The cubic root of 5256399 is about 173.8719165731.

The spelling of 5256399 in words is "five million, two hundred fifty-six thousand, three hundred ninety-nine".