3445021 has 2 divisors, whose sum is σ = 3445022. Its totient is φ = 3445020.

The previous prime is 3445019. The next prime is 3445027. The reversal of 3445021 is 1205443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3276100 + 168921 = 1810^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 3445021 - 2¹ = 3445019 is a prime.

Together with 3445019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3445021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3445027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1722510 + 1722511.

It is an arithmetic number, because the mean of its divisors is an integer number (1722511).

Almost surely, 2^3445021 is an apocalyptic number.

It is an amenable number.

3445021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3445021 is an equidigital number, since it uses as much as digits as its factorization.

3445021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 3445021 is about 1856.0767764293. The cubic root of 3445021 is about 151.0302557679.

The spelling of 3445021 in words is "three million, four hundred forty-five thousand, twenty-one".