121418 has 8 divisors (see below), whose sum is σ = 198720. Its totient is φ = 55180.

The previous prime is 121403. The next prime is 121421. The reversal of 121418 is 814121.

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

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 121396 and 121405.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121418.

It is an unprimeable number.

121418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2738 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (24840).

2¹²¹⁴¹⁸ is an apocalyptic number.

121418 is a deficient number, since it is larger than the sum of its proper divisors (77302).

121418 is a wasteful number, since it uses less digits than its factorization.

121418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532.

The product of its digits is 64, while the sum is 17.

The square root of 121418 is about 348.4508573673. The cubic root of 121418 is about 49.5177639199.

Adding to 121418 its reverse (814121), we get a palindrome (935539).

The spelling of 121418 in words is "one hundred twenty-one thousand, four hundred eighteen".