2194901 has 2 divisors, whose sum is σ = 2194902. Its totient is φ = 2194900.

The previous prime is 2194897. The next prime is 2194903. The reversal of 2194901 is 1094912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 276676 = 1385^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194901 - 2² = 2194897 is a prime.

Together with 2194903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2194903) 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 as a sum of consecutive naturals, namely, 1097450 + 1097451.

It is an arithmetic number, because the mean of its divisors is an integer number (1097451).

2^2194901 is an apocalyptic number.

It is an amenable number.

2194901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194901 is an equidigital number, since it uses as much as digits as its factorization.

2194901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2194901 is about 1481.5198277445. The cubic root of 2194901 is about 129.9585864140.

The spelling of 2194901 in words is "two million, one hundred ninety-four thousand, nine hundred one".