It is a happy number.
It is a semiprime because it is the product of two primes.
It is a congruent number.
It is an unprimeable number.
21146686 is an apocalyptic number.
1146686 is an equidigital number, since it uses as much as digits as its factorization.
1146686 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 573345.
The square root of 1146686 is about 1070.8342542149. The cubic root of 1146686 is about 104.6682195577.
The spelling of 1146686 in words is "one million, one hundred forty-six thousand, six hundred eighty-six".