4451009 has 4 divisors (see below), whose sum is σ = 4463316. Its totient is φ = 4438704.

The previous prime is 4450981. The next prime is 4451017. The reversal of 4451009 is 9001544.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3139984 + 1311025 = 1772^2 + 1145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4451009 is a prime.

It is a super-2 number, since 2×4451009² = 39622962236162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4451309) 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 in 3 ways as a sum of consecutive naturals, for example, 5594 + ... + 6339.

It is an arithmetic number, because the mean of its divisors is an integer number (1115829).

Almost surely, 2^4451009 is an apocalyptic number.

It is an amenable number.

4451009 is a deficient number, since it is larger than the sum of its proper divisors (12307).

4451009 is a wasteful number, since it uses less digits than its factorization.

4451009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12306.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 4451009 is about 2109.7414533539. The cubic root of 4451009 is about 164.4950463982.

The spelling of 4451009 in words is "four million, four hundred fifty-one thousand, nine".