2194945 has 4 divisors (see below), whose sum is σ = 2633940. Its totient is φ = 1755952.

The previous prime is 2194939. The next prime is 2194961. The reversal of 2194945 is 5494912.

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 223729 + 1971216 = 473^2 + 1404^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194945 - 2¹³ = 2186753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2194945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219490 + ... + 219499.

It is an arithmetic number, because the mean of its divisors is an integer number (658485).

2^2194945 is an apocalyptic number.

It is an amenable number.

2194945 is a deficient number, since it is larger than the sum of its proper divisors (438995).

2194945 is an equidigital number, since it uses as much as digits as its factorization.

2194945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438994.

The product of its digits is 12960, while the sum is 34.

The square root of 2194945 is about 1481.5346772857. The cubic root of 2194945 is about 129.9594548115.

The spelling of 2194945 in words is "two million, one hundred ninety-four thousand, nine hundred forty-five".