3256321 has 4 divisors (see below), whose sum is σ = 3285252. Its totient is φ = 3227392.

The previous prime is 3256313. The next prime is 3256327. The reversal of 3256321 is 1236523.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1236523 = 47 ⋅26309.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 1718721 = 1240^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 3256321 - 2³ = 3256313 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3256292 and 3256301.

It is not an unprimeable number, because it can be changed into a prime (3256327) 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 3 ways as a sum of consecutive naturals, for example, 14296 + ... + 14521.

It is an arithmetic number, because the mean of its divisors is an integer number (821313).

It is a Proth number, since it is equal to 795 ⋅ 2¹² + 1 and 795 < 2¹².

Almost surely, 2^3256321 is an apocalyptic number.

It is an amenable number.

3256321 is a deficient number, since it is larger than the sum of its proper divisors (28931).

3256321 is a wasteful number, since it uses less digits than its factorization.

3256321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28930.

The product of its digits is 1080, while the sum is 22.

The square root of 3256321 is about 1804.5279161044. The cubic root of 3256321 is about 148.2207716798.

The spelling of 3256321 in words is "three million, two hundred fifty-six thousand, three hundred twenty-one".