2194145 has 4 divisors (see below), whose sum is σ = 2632980. Its totient is φ = 1755312.

The previous prime is 2194133. The next prime is 2194187. The reversal of 2194145 is 5414912.

2194145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 829921 + 1364224 = 911^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194145 - 2⁸ = 2193889 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 219410 + ... + 219419.

It is an arithmetic number, because the mean of its divisors is an integer number (658245).

2^2194145 is an apocalyptic number.

It is an amenable number.

2194145 is a deficient number, since it is larger than the sum of its proper divisors (438835).

2194145 is an equidigital number, since it uses as much as digits as its factorization.

2194145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438834.

The product of its digits is 1440, while the sum is 26.

The square root of 2194145 is about 1481.2646623747. The cubic root of 2194145 is about 129.9436639530.

The spelling of 2194145 in words is "two million, one hundred ninety-four thousand, one hundred forty-five".