2043509 has 8 divisors (see below), whose sum is σ = 2214912. Its totient is φ = 1874160.

The previous prime is 2043497. The next prime is 2043511. The reversal of 2043509 is 9053402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2043509 - 2²⁰ = 994933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2072 + ... + 2894.

It is an arithmetic number, because the mean of its divisors is an integer number (276864).

2^2043509 is an apocalyptic number.

It is an amenable number.

2043509 is a deficient number, since it is larger than the sum of its proper divisors (171403).

2043509 is a wasteful number, since it uses less digits than its factorization.

2043509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2043509 is about 1429.5135536258. The cubic root of 2043509 is about 126.8991904662.

It can be divided in two parts, 2043 and 509, that added together give a palindrome (2552).

The spelling of 2043509 in words is "two million, forty-three thousand, five hundred nine".