5256321 has 8 divisors (see below), whose sum is σ = 8009664. Its totient is φ = 3003600.

The previous prime is 5256319. The next prime is 5256341. The reversal of 5256321 is 1236525.

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

It is not a de Polignac number, because 5256321 - 2¹ = 5256319 is a prime.

It is an alternating number because its digits alternate between odd and even.

5256321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5256291 and 5256300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5256311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125130 + ... + 125171.

It is an arithmetic number, because the mean of its divisors is an integer number (1001208).

Almost surely, 2^5256321 is an apocalyptic number.

It is an amenable number.

5256321 is a deficient number, since it is larger than the sum of its proper divisors (2753343).

5256321 is a wasteful number, since it uses less digits than its factorization.

5256321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250311.

The product of its digits is 1800, while the sum is 24.

The square root of 5256321 is about 2292.6667878259. Note that the first 3 decimals coincide. The cubic root of 5256321 is about 173.8710565371.

The spelling of 5256321 in words is "five million, two hundred fifty-six thousand, three hundred twenty-one".