4382921 has 2 divisors, whose sum is σ = 4382922. Its totient is φ = 4382920.

The previous prime is 4382893. The next prime is 4382927. The reversal of 4382921 is 1292834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3857296 + 525625 = 1964^2 + 725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4382921 is a prime.

It is not a weakly prime, because it can be changed into another prime (4382927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2191460 + 2191461.

It is an arithmetic number, because the mean of its divisors is an integer number (2191461).

Almost surely, 2^4382921 is an apocalyptic number.

It is an amenable number.

4382921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4382921 is an equidigital number, since it uses as much as digits as its factorization.

4382921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 4382921 is about 2093.5426912294. The cubic root of 4382921 is about 163.6519612049.

The spelling of 4382921 in words is "four million, three hundred eighty-two thousand, nine hundred twenty-one".