Adding to 1212343 its reverse (3432121), we get a palindrome (4644464).
It is a happy number.
1212343 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1212343 is a prime.
It is an alternating number because its digits alternate between odd and even.
1212343 is a lucky number.
It is a congruent number.
21212343 is an apocalyptic number.
1212343 is a wasteful number, since it uses less digits than its factorization.
1212343 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 677.
The square root of 1212343 is about 1101.0644849417. The cubic root of 1212343 is about 106.6289591109.
The spelling of 1212343 in words is "one million, two hundred twelve thousand, three hundred forty-three".