3305021 has 4 divisors (see below), whose sum is σ = 3499452. Its totient is φ = 3110592.

The previous prime is 3305017. The next prime is 3305033. The reversal of 3305021 is 1205033.

3305021 = 1285² + 1286².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1205033 = 47 ⋅25639.

It can be written as a sum of positive squares in 2 ways, for example, as 1651225 + 1653796 = 1285^2 + 1286^2 .

It is not a de Polignac number, because 3305021 - 2² = 3305017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3304987 and 3305005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3305011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97190 + ... + 97223.

It is an arithmetic number, because the mean of its divisors is an integer number (874863).

Almost surely, 2^3305021 is an apocalyptic number.

3305021 is the 1286-th centered square number.

It is an amenable number.

3305021 is a deficient number, since it is larger than the sum of its proper divisors (194431).

3305021 is a wasteful number, since it uses less digits than its factorization.

3305021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194430.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 3305021 is about 1817.9716719465. The cubic root of 3305021 is about 148.9560250391.

The spelling of 3305021 in words is "three million, three hundred five thousand, twenty-one".