2025409 has 2 divisors, whose sum is σ = 2025410. Its totient is φ = 2025408.

The previous prime is 2025377. The next prime is 2025421. The reversal of 2025409 is 9045202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 815409 = 1100^2 + 903^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025409 - 2⁵ = 2025377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2025409.

It is not a weakly prime, because it can be changed into another prime (2025479) 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 as a sum of consecutive naturals, namely, 1012704 + 1012705.

It is an arithmetic number, because the mean of its divisors is an integer number (1012705).

2^2025409 is an apocalyptic number.

It is an amenable number.

2025409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2025409 is an equidigital number, since it uses as much as digits as its factorization.

2025409 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2025409 is about 1423.1686477716. The cubic root of 2025409 is about 126.5234168505.

The spelling of 2025409 in words is "two million, twenty-five thousand, four hundred nine".