4445921 has 2 divisors, whose sum is σ = 4445922. Its totient is φ = 4445920.

The previous prime is 4445879. The next prime is 4445933. The reversal of 4445921 is 1295444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2768896 + 1677025 = 1664^2 + 1295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4445921 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4445941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222960 + 2222961.

It is an arithmetic number, because the mean of its divisors is an integer number (2222961).

Almost surely, 2^4445921 is an apocalyptic number.

It is an amenable number.

4445921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445921 is an equidigital number, since it uses as much as digits as its factorization.

4445921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 4445921 is about 2108.5352735963. The cubic root of 4445921 is about 164.4323437684.

The spelling of 4445921 in words is "four million, four hundred forty-five thousand, nine hundred twenty-one".