1994243 has 4 divisors (see below), whose sum is σ = 2063040. Its totient is φ = 1925448.

The previous prime is 1994227. The next prime is 1994299. The reversal of 1994243 is 3424991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1994243 - 2⁴ = 1994227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994203) 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, 34355 + ... + 34412.

It is an arithmetic number, because the mean of its divisors is an integer number (515760).

2^1994243 is an apocalyptic number.

1994243 is a deficient number, since it is larger than the sum of its proper divisors (68797).

1994243 is an equidigital number, since it uses as much as digits as its factorization.

1994243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68796.

The product of its digits is 7776, while the sum is 32.

The square root of 1994243 is about 1412.1766886619. The cubic root of 1994243 is about 125.8710993855.

The spelling of 1994243 in words is "one million, nine hundred ninety-four thousand, two hundred forty-three".