121404406 has 8 divisors (see below), whose sum is σ = 182167920. Its totient is φ = 60681768.

The previous prime is 121404383. The next prime is 121404449. The reversal of 121404406 is 604404121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201 + ... + 15628.

It is an arithmetic number, because the mean of its divisors is an integer number (22770990).

Almost surely, 2^121404406 is an apocalyptic number.

121404406 is a deficient number, since it is larger than the sum of its proper divisors (60763514).

121404406 is a wasteful number, since it uses less digits than its factorization.

121404406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20438.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 121404406 is about 11018.3667573738. The cubic root of 121404406 is about 495.1591584244.

Adding to 121404406 its reverse (604404121), we get a palindrome (725808527).

The spelling of 121404406 in words is "one hundred twenty-one million, four hundred four thousand, four hundred six".