3021220 has 24 divisors (see below), whose sum is σ = 6564600. Its totient is φ = 1166592.

The previous prime is 3021173. The next prime is 3021241. The reversal of 3021220 is 221203.

It can be written as a sum of positive squares in 4 ways, for example, as 1127844 + 1893376 = 1062^2 + 1376^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 3021197 and 3021206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025 + ... + 3184.

It is an arithmetic number, because the mean of its divisors is an integer number (273525).

Almost surely, 2^3021220 is an apocalyptic number.

It is an amenable number.

3021220 is an abundant number, since it is smaller than the sum of its proper divisors (3543380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3021220 is a wasteful number, since it uses less digits than its factorization.

3021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247 (or 5245 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 3021220 is about 1738.1656998112. The cubic root of 3021220 is about 144.5642088020.

Adding to 3021220 its reverse (221203), we get a palindrome (3242423).

The spelling of 3021220 in words is "three million, twenty-one thousand, two hundred twenty".