2042509 has 8 divisors (see below), whose sum is σ = 2343168. Its totient is φ = 1744080.

The previous prime is 2042489. The next prime is 2042531. The reversal of 2042509 is 9052402.

It is a happy number.

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 2042509 - 2⁵ = 2042477 is a prime.

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 2042509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042549) 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, 2679 + ... + 3355.

It is an arithmetic number, because the mean of its divisors is an integer number (292896).

2^2042509 is an apocalyptic number.

It is an amenable number.

2042509 is a deficient number, since it is larger than the sum of its proper divisors (300659).

2042509 is an equidigital number, since it uses as much as digits as its factorization.

2042509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2042509 is about 1429.1637414936. The cubic root of 2042509 is about 126.8784875322.

The spelling of 2042509 in words is "two million, forty-two thousand, five hundred nine".