121814405 has 8 divisors (see below), whose sum is σ = 148935672. Its totient is φ = 95612608.

The previous prime is 121814393. The next prime is 121814431. The reversal of 121814405 is 504418121.

It can be written as a sum of positive squares in 4 ways, for example, as 10764961 + 111049444 = 3281^2 + 10538^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121814405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229574 + ... + 230103.

It is an arithmetic number, because the mean of its divisors is an integer number (18616959).

Almost surely, 2^121814405 is an apocalyptic number.

It is an amenable number.

121814405 is a deficient number, since it is larger than the sum of its proper divisors (27121267).

121814405 is an equidigital number, since it uses as much as digits as its factorization.

121814405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459735.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 121814405 is about 11036.9563286261. The cubic root of 121814405 is about 495.7159384685.

The spelling of 121814405 in words is "one hundred twenty-one million, eight hundred fourteen thousand, four hundred five".