121404405 has 8 divisors (see below), whose sum is σ = 194247072. Its totient is φ = 64749008.

The previous prime is 121404383. The next prime is 121404449. The reversal of 121404405 is 504404121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121404405 - 2¹⁴ = 121388021 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 4046799 + ... + 4046828.

It is an arithmetic number, because the mean of its divisors is an integer number (24280884).

Almost surely, 2^121404405 is an apocalyptic number.

121404405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121404405 is a deficient number, since it is larger than the sum of its proper divisors (72842667).

121404405 is an equidigital number, since it uses as much as digits as its factorization.

121404405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093635.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121404405 is about 11018.3667119950. The cubic root of 121404405 is about 495.1591570649.

Adding to 121404405 its reverse (504404121), we get a palindrome (625808526).

The spelling of 121404405 in words is "one hundred twenty-one million, four hundred four thousand, four hundred five".