2909825 has 12 divisors (see below), whose sum is σ = 3630720. Its totient is φ = 2313360.

The previous prime is 2909813. The next prime is 2909827. The reversal of 2909825 is 5289092.

It is not a de Polignac number, because 2909825 - 2¹⁸ = 2647681 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2909827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5732 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (302560).

2^2909825 is an apocalyptic number.

2909825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2909825 is a deficient number, since it is larger than the sum of its proper divisors (720895).

2909825 is a wasteful number, since it uses less digits than its factorization.

2909825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 2909825 is about 1705.8209167436. The cubic root of 2909825 is about 142.7651777144.

The spelling of 2909825 in words is "two million, nine hundred nine thousand, eight hundred twenty-five".