3256221 has 4 divisors (see below), whose sum is σ = 4341632. Its totient is φ = 2170812.

The previous prime is 3256217. The next prime is 3256229. The reversal of 3256221 is 1226523.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1226523 = 3 ⋅408841.

It is not a de Polignac number, because 3256221 - 2² = 3256217 is a prime.

It is a D-number.

It is the 1805-th Hogben 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 (3256229) by changing a digit.

It is a nontrivial repunit in base 1804.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542701 + ... + 542706.

It is an arithmetic number, because the mean of its divisors is an integer number (1085408).

Almost surely, 2^3256221 is an apocalyptic number.

It is an amenable number.

3256221 is a deficient number, since it is larger than the sum of its proper divisors (1085411).

3256221 is a wasteful number, since it uses less digits than its factorization.

3256221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085410.

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

The square root of 3256221 is about 1804.5002078138. The cubic root of 3256221 is about 148.2192544021.

The spelling of 3256221 in words is "three million, two hundred fifty-six thousand, two hundred twenty-one".