2185994 has 4 divisors (see below), whose sum is σ = 3278994. Its totient is φ = 1092996.

The previous prime is 2185987. The next prime is 2185999. The reversal of 2185994 is 4995812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 97969 = 1445^2 + 313^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2185999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546497 + ... + 546500.

2^2185994 is an apocalyptic number.

2185994 is a deficient number, since it is larger than the sum of its proper divisors (1093000).

2185994 is a wasteful number, since it uses less digits than its factorization.

2185994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092999.

The product of its digits is 25920, while the sum is 38.

The square root of 2185994 is about 1478.5107371947. The cubic root of 2185994 is about 129.7825556268.

The spelling of 2185994 in words is "two million, one hundred eighty-five thousand, nine hundred ninety-four".