4197986 has 8 divisors (see below), whose sum is σ = 6781404. Its totient is φ = 1937520.

The previous prime is 4197967. The next prime is 4198003. The reversal of 4197986 is 6897914.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 469225 = 1931^2 + 685^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80705 + ... + 80756.

Almost surely, 2^4197986 is an apocalyptic number.

4197986 is a deficient number, since it is larger than the sum of its proper divisors (2583418).

4197986 is a wasteful number, since it uses less digits than its factorization.

4197986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161476.

The product of its digits is 108864, while the sum is 44.

The square root of 4197986 is about 2048.8987285857. The cubic root of 4197986 is about 161.3170712308.

The spelling of 4197986 in words is "four million, one hundred ninety-seven thousand, nine hundred eighty-six".