3130021 has 8 divisors (see below), whose sum is σ = 3236760. Its totient is φ = 3025152.

The previous prime is 3130019. The next prime is 3130027. The reversal of 3130021 is 1200313.

It can be written as a sum of positive squares in 4 ways, for example, as 1476225 + 1653796 = 1215^2 + 1286^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3130021 - 2¹ = 3130019 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 (3130027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3465 + ... + 4273.

It is an arithmetic number, because the mean of its divisors is an integer number (404595).

Almost surely, 2^3130021 is an apocalyptic number.

It is an amenable number.

3130021 is a deficient number, since it is larger than the sum of its proper divisors (106739).

3130021 is an equidigital number, since it uses as much as digits as its factorization.

3130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 3130021 is about 1769.1865362364. The cubic root of 3130021 is about 146.2791463083.

Adding to 3130021 its reverse (1200313), we get a palindrome (4330334).

The spelling of 3130021 in words is "three million, one hundred thirty thousand, twenty-one".