2195409 has 4 divisors (see below), whose sum is σ = 2927216. Its totient is φ = 1463604.

The previous prime is 2195399. The next prime is 2195411. The reversal of 2195409 is 9045912.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2195409 - 2⁹ = 2194897 is a prime.

It is a D-number.

It is a Duffinian number.

2195409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2195009) 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 in 3 ways as a sum of consecutive naturals, for example, 365899 + ... + 365904.

It is an arithmetic number, because the mean of its divisors is an integer number (731804).

2^2195409 is an apocalyptic number.

It is an amenable number.

2195409 is a deficient number, since it is larger than the sum of its proper divisors (731807).

2195409 is an equidigital number, since it uses as much as digits as its factorization.

2195409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731806.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2195409 is about 1481.6912633879. The cubic root of 2195409 is about 129.9686117514.

The spelling of 2195409 in words is "two million, one hundred ninety-five thousand, four hundred nine".