2725209 has 6 divisors (see below), whose sum is σ = 3936426. Its totient is φ = 1816800.

The previous prime is 2725199. The next prime is 2725231. The reversal of 2725209 is 9025272.

It is a happy number.

2725209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2673225 + 51984 = 1635^2 + 228^2 .

It is not a de Polignac number, because 2725209 - 2⁹ = 2724697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2725259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151392 + ... + 151409.

It is an arithmetic number, because the mean of its divisors is an integer number (656071).

2^2725209 is an apocalyptic number.

It is an amenable number.

2725209 is a deficient number, since it is larger than the sum of its proper divisors (1211217).

2725209 is a wasteful number, since it uses less digits than its factorization.

2725209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302807 (or 302804 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2725209 is about 1650.8207049828. The cubic root of 2725209 is about 139.6796928958.

The spelling of 2725209 in words is "two million, seven hundred twenty-five thousand, two hundred nine".