1994161 has 8 divisors (see below), whose sum is σ = 2160704. Its totient is φ = 1829520.

The previous prime is 1994143. The next prime is 1994191. The reversal of 1994161 is 1614991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1994161 - 2⁷ = 1994033 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994101) 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 7 ways as a sum of consecutive naturals, for example, 2380 + ... + 3106.

It is an arithmetic number, because the mean of its divisors is an integer number (270088).

2^1994161 is an apocalyptic number.

It is an amenable number.

1994161 is a deficient number, since it is larger than the sum of its proper divisors (166543).

1994161 is a wasteful number, since it uses less digits than its factorization.

1994161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951.

The product of its digits is 1944, while the sum is 31.

The square root of 1994161 is about 1412.1476551692. The cubic root of 1994161 is about 125.8693741575.

It can be divided in two parts, 19941 and 61, that added together give a palindrome (20002).

The spelling of 1994161 in words is "one million, nine hundred ninety-four thousand, one hundred sixty-one".