Adding to 121415 its reverse (514121), we get a palindrome (635536).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a tribonacci number.
It is a self number, because there is not a number n which added to its sum of digits gives 121415.
It is a congruent number.
It is an unprimeable number.
2121415 is an apocalyptic number.
121415 is an equidigital number, since it uses as much as digits as its factorization.
121415 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3481.
The square root of 121415 is about 348.4465525730. The cubic root of 121415 is about 49.5173560877.
The spelling of 121415 in words is "one hundred twenty-one thousand, four hundred fifteen".