2194981 has 4 divisors (see below), whose sum is σ = 2270700. Its totient is φ = 2119264.

The previous prime is 2194979. The next prime is 2194991. The reversal of 2194981 is 1894912.

2194981 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 1846881 + 348100 = 1359^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194981 - 2¹ = 2194979 is a prime.

It is a super-2 number, since 2×2194981² = 9635883180722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194901) by changing a digit.

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, 37816 + ... + 37873.

It is an arithmetic number, because the mean of its divisors is an integer number (567675).

2^2194981 is an apocalyptic number.

It is an amenable number.

2194981 is a deficient number, since it is larger than the sum of its proper divisors (75719).

2194981 is an equidigital number, since it uses as much as digits as its factorization.

2194981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75718.

The product of its digits is 5184, while the sum is 34.

The square root of 2194981 is about 1481.5468267996. The cubic root of 2194981 is about 129.9601653099.

The spelling of 2194981 in words is "two million, one hundred ninety-four thousand, nine hundred eighty-one".