1043509 has 4 divisors (see below), whose sum is σ = 1049004. Its totient is φ = 1038016.

The previous prime is 1043501. The next prime is 1043513. The reversal of 1043509 is 9053401.

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 956484 + 87025 = 978^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043509 - 2³ = 1043501 is a prime.

It is a super-2 number, since 2×1043509² = 2177822066162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1043509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043501) 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 3 ways as a sum of consecutive naturals, for example, 2452 + ... + 2845.

It is an arithmetic number, because the mean of its divisors is an integer number (262251).

2^1043509 is an apocalyptic number.

It is an amenable number.

1043509 is a deficient number, since it is larger than the sum of its proper divisors (5495).

1043509 is an equidigital number, since it uses as much as digits as its factorization.

1043509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1043509 is about 1021.5228827589. The cubic root of 1043509 is about 101.4297604266.

The spelling of 1043509 in words is "one million, forty-three thousand, five hundred nine".