3331921 has 2 divisors, whose sum is σ = 3331922. Its totient is φ = 3331920.

The previous prime is 3331891. The next prime is 3331927. The reversal of 3331921 is 1291333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3330625 + 1296 = 1825^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 3331921 - 2⁹ = 3331409 is a prime.

It is a super-2 number, since 2×3331921² = 22203395100482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3331892 and 3331901.

It is not a weakly prime, because it can be changed into another prime (3331927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665960 + 1665961.

It is an arithmetic number, because the mean of its divisors is an integer number (1665961).

Almost surely, 2^3331921 is an apocalyptic number.

It is an amenable number.

3331921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3331921 is an equidigital number, since it uses as much as digits as its factorization.

3331921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 22.

The square root of 3331921 is about 1825.3550339591. The cubic root of 3331921 is about 149.3590577805.

The spelling of 3331921 in words is "three million, three hundred thirty-one thousand, nine hundred twenty-one".