4299721 has 2 divisors, whose sum is σ = 4299722. Its totient is φ = 4299720.

The previous prime is 4299709. The next prime is 4299727. The reversal of 4299721 is 1279924.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3553225 + 746496 = 1885^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 4299721 - 2⁹ = 4299209 is a prime.

4299721 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4299727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2149860 + 2149861.

It is an arithmetic number, because the mean of its divisors is an integer number (2149861).

Almost surely, 2^4299721 is an apocalyptic number.

It is an amenable number.

4299721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4299721 is an equidigital number, since it uses as much as digits as its factorization.

4299721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 4299721 is about 2073.5768613678. The cubic root of 4299721 is about 162.6098161058.

The spelling of 4299721 in words is "four million, two hundred ninety-nine thousand, seven hundred twenty-one".