3230821 has 6 divisors (see below), whose sum is σ = 3551366. Its totient is φ = 2937000.

The previous prime is 3230813. The next prime is 3230831. The reversal of 3230821 is 1280323.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 1185921 = 1430^2 + 1089^2 .

It is not a de Polignac number, because 3230821 - 2³ = 3230813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3230831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13230 + ... + 13471.

Almost surely, 2^3230821 is an apocalyptic number.

It is an amenable number.

3230821 is a deficient number, since it is larger than the sum of its proper divisors (320545).

3230821 is a wasteful number, since it uses less digits than its factorization.

3230821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26723 (or 26712 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3230821 is about 1797.4484693587. The cubic root of 3230821 is about 147.8328554985.

The spelling of 3230821 in words is "three million, two hundred thirty thousand, eight hundred twenty-one".