4221379 has 2 divisors, whose sum is σ = 4221380. Its totient is φ = 4221378.

The previous prime is 4221361. The next prime is 4221407. The reversal of 4221379 is 9731224.

It is an a-pointer prime, because the next prime (4221407) can be obtained adding 4221379 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221379 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4221179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110689 + 2110690.

It is an arithmetic number, because the mean of its divisors is an integer number (2110690).

Almost surely, 2^4221379 is an apocalyptic number.

4221379 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221379 is an equidigital number, since it uses as much as digits as its factorization.

4221379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 4221379 is about 2054.5994743502. The cubic root of 4221379 is about 161.6161592793.

The spelling of 4221379 in words is "four million, two hundred twenty-one thousand, three hundred seventy-nine".