3012021 has 18 divisors (see below), whose sum is σ = 4478838. Its totient is φ = 1950480.

The previous prime is 3012019. The next prime is 3012041. The reversal of 3012021 is 1202103.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 1347921 = 1290^2 + 1161^2 .

It is not a de Polignac number, because 3012021 - 2¹ = 3012019 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 a junction number, because it is equal to n+sod(n) for n = 3011994 and 3012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012001) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16551 + ... + 16731.

Almost surely, 2^3012021 is an apocalyptic number.

It is an amenable number.

3012021 is a deficient number, since it is larger than the sum of its proper divisors (1466817).

3012021 is a wasteful number, since it uses less digits than its factorization.

3012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 227 counting only the distinct ones).

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

The square root of 3012021 is about 1735.5175020725. The cubic root of 3012021 is about 144.4173367715.

Adding to 3012021 its reverse (1202103), we get a palindrome (4214124).

The spelling of 3012021 in words is "three million, twelve thousand, twenty-one".