121347305 has 4 divisors (see below), whose sum is σ = 145616772. Its totient is φ = 97077840.

The previous prime is 121347301. The next prime is 121347311. The reversal of 121347305 is 503743121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91546624 + 29800681 = 9568^2 + 5459^2 .

It is not a de Polignac number, because 121347305 - 2² = 121347301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121347301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12134726 + ... + 12134735.

It is an arithmetic number, because the mean of its divisors is an integer number (36404193).

Almost surely, 2^121347305 is an apocalyptic number.

It is an amenable number.

121347305 is a deficient number, since it is larger than the sum of its proper divisors (24269467).

121347305 is an equidigital number, since it uses as much as digits as its factorization.

121347305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24269466.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 121347305 is about 11015.7752791168. The cubic root of 121347305 is about 495.0815156711.

The spelling of 121347305 in words is "one hundred twenty-one million, three hundred forty-seven thousand, three hundred five".