3221001 has 48 divisors (see below), whose sum is σ = 5765760. Its totient is φ = 1693440.

The previous prime is 3220967. The next prime is 3221017. The reversal of 3221001 is 1001223.

It is a happy number.

It is not a de Polignac number, because 3221001 - 2⁷ = 3220873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3221401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74886 + ... + 74928.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

Almost surely, 2^3221001 is an apocalyptic number.

It is an amenable number.

3221001 is a deficient number, since it is larger than the sum of its proper divisors (2544759).

3221001 is a wasteful number, since it uses less digits than its factorization.

3221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 3221001 is about 1794.7147405646. The cubic root of 3221001 is about 147.6829253981.

Adding to 3221001 its reverse (1001223), we get a palindrome (4222224).

The spelling of 3221001 in words is "three million, two hundred twenty-one thousand, one".