4321999 has 12 divisors (see below), whose sum is σ = 4960368. Its totient is φ = 3755840.

The previous prime is 4321997. The next prime is 4322009. The reversal of 4321999 is 9991234.

It is not a de Polignac number, because 4321999 - 2¹ = 4321997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4321997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2007 + ... + 3559.

It is an arithmetic number, because the mean of its divisors is an integer number (413364).

Almost surely, 2^4321999 is an apocalyptic number.

4321999 is a deficient number, since it is larger than the sum of its proper divisors (638369).

4321999 is a wasteful number, since it uses less digits than its factorization.

4321999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1587 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 4321999 is about 2078.9417981271. The cubic root of 4321999 is about 162.8901740516.

It can be divided in two parts, 4 and 321999, that added together give a triangular number (322003 = T₈₀₂).

The spelling of 4321999 in words is "four million, three hundred twenty-one thousand, nine hundred ninety-nine".