3102021 has 12 divisors (see below), whose sum is σ = 4825548. Its totient is φ = 1908864.

The previous prime is 3102017. The next prime is 3102023. The reversal of 3102021 is 1202013.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 497025 + 2604996 = 705^2 + 1614^2 .

It is not a de Polignac number, because 3102021 - 2² = 3102017 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 3101994 and 3102012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3102023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13140 + ... + 13373.

It is an arithmetic number, because the mean of its divisors is an integer number (402129).

Almost surely, 2^3102021 is an apocalyptic number.

It is an amenable number.

3102021 is a deficient number, since it is larger than the sum of its proper divisors (1723527).

3102021 is a wasteful number, since it uses less digits than its factorization.

3102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26532 (or 26529 counting only the distinct ones).

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

The square root of 3102021 is about 1761.2555180893. The cubic root of 3102021 is about 145.8416529313.

Adding to 3102021 its reverse (1202013), we get a palindrome (4304034).

The spelling of 3102021 in words is "three million, one hundred two thousand, twenty-one".