2492009 has 4 divisors (see below), whose sum is σ = 2683716. Its totient is φ = 2300304.

The previous prime is 2492003. The next prime is 2492011. The reversal of 2492009 is 9002942.

2492009 = 297² + 298² + ... + 322².

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 120409 + 2371600 = 347^2 + 1540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2492009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2492003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95834 + ... + 95859.

It is an arithmetic number, because the mean of its divisors is an integer number (670929).

2^2492009 is an apocalyptic number.

It is an amenable number.

2492009 is a deficient number, since it is larger than the sum of its proper divisors (191707).

2492009 is a wasteful number, since it uses less digits than its factorization.

2492009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191706.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2492009 is about 1578.6098314656. The cubic root of 2492009 is about 135.5761204081.

The spelling of 2492009 in words is "two million, four hundred ninety-two thousand, nine".