It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 10 and base 16.
It is a congruent number.
It is an unprimeable number.
21345678 is an apocalyptic number.
1345678 is a wasteful number, since it uses less digits than its factorization.
1345678 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1682.
The square root of 1345678 is about 1160.0336202024. The cubic root of 1345678 is about 110.4028752839.
The spelling of 1345678 in words is "one million, three hundred forty-five thousand, six hundred seventy-eight".