4321009 has 16 divisors (see below), whose sum is σ = 5705856. Its totient is φ = 3168000.

The previous prime is 4321003. The next prime is 4321019. The reversal of 4321009 is 9001234.

4321009 = 85² + 86² + ... + 238².

It is not a de Polignac number, because 4321009 - 2²¹ = 2223857 is a prime.

It is a super-2 number, since 2×4321009² = 37342237556162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4321003) 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 15 ways as a sum of consecutive naturals, for example, 342 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (356616).

Almost surely, 2^4321009 is an apocalyptic number.

It is an amenable number.

4321009 is a deficient number, since it is larger than the sum of its proper divisors (1384847).

4321009 is a wasteful number, since it uses less digits than its factorization.

4321009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 4321009 is about 2078.7036825868. The cubic root of 4321009 is about 162.8777358576.

It can be divided in two parts, 432 and 1009, that added together give a palindrome (1441).

The spelling of 4321009 in words is "four million, three hundred twenty-one thousand, nine".