4328921 has 2 divisors, whose sum is σ = 4328922. Its totient is φ = 4328920.

The previous prime is 4328893. The next prime is 4328923. The reversal of 4328921 is 1298234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 1784896 = 1595^2 + 1336^2 .

It is a cyclic number.

It is not a de Polignac number, because 4328921 - 2¹⁴ = 4312537 is a prime.

Together with 4328923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4328923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2164460 + 2164461.

It is an arithmetic number, because the mean of its divisors is an integer number (2164461).

Almost surely, 2^4328921 is an apocalyptic number.

It is an amenable number.

4328921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4328921 is an equidigital number, since it uses as much as digits as its factorization.

4328921 is an evil number, because the sum of its binary digits is even.

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

The square root of 4328921 is about 2080.6059213604. The cubic root of 4328921 is about 162.9770878756.

The spelling of 4328921 in words is "four million, three hundred twenty-eight thousand, nine hundred twenty-one".