1994971 has 4 divisors (see below), whose sum is σ = 2176344. Its totient is φ = 1813600.

The previous prime is 1994959. The next prime is 1994977. The reversal of 1994971 is 1794991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1794991 = 11 ⋅163181.

It is a cyclic number.

It is not a de Polignac number, because 1994971 - 2⁷ = 1994843 is a prime.

It is a Duffinian number.

1994971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1994977) 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 3 ways as a sum of consecutive naturals, for example, 90670 + ... + 90691.

It is an arithmetic number, because the mean of its divisors is an integer number (544086).

2^1994971 is an apocalyptic number.

1994971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1994971 is a deficient number, since it is larger than the sum of its proper divisors (181373).

1994971 is a wasteful number, since it uses less digits than its factorization.

1994971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181372.

The product of its digits is 20412, while the sum is 40.

The square root of 1994971 is about 1412.4344232565. The cubic root of 1994971 is about 125.8864139706.

The spelling of 1994971 in words is "one million, nine hundred ninety-four thousand, nine hundred seventy-one".