2194237 has 4 divisors (see below), whose sum is σ = 2216956. Its totient is φ = 2171520.

The previous prime is 2194229. The next prime is 2194243. The reversal of 2194237 is 7324912.

2194237 is nontrivially palindromic in base 11.

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 1705636 + 488601 = 1306^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194237 - 2³ = 2194229 is a prime.

It is a Duffinian number.

2194237 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194267) 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, 11214 + ... + 11407.

It is an arithmetic number, because the mean of its divisors is an integer number (554239).

2^2194237 is an apocalyptic number.

It is an amenable number.

2194237 is a deficient number, since it is larger than the sum of its proper divisors (22719).

2194237 is an equidigital number, since it uses as much as digits as its factorization.

2194237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22718.

The product of its digits is 3024, while the sum is 28.

The square root of 2194237 is about 1481.2957165941. The cubic root of 2194237 is about 129.9454800970.

The spelling of 2194237 in words is "two million, one hundred ninety-four thousand, two hundred thirty-seven".