121243345 has 8 divisors (see below), whose sum is σ = 150509160. Its totient is φ = 93649920.

The previous prime is 121243333. The next prime is 121243399. The reversal of 121243345 is 543342121.

It can be written as a sum of positive squares in 4 ways, for example, as 968256 + 120275089 = 984^2 + 10967^2 .

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

It is not a de Polignac number, because 121243345 - 2⁹ = 121242833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417936 + ... + 418225.

It is an arithmetic number, because the mean of its divisors is an integer number (18813645).

Almost surely, 2^121243345 is an apocalyptic number.

It is an amenable number.

121243345 is a deficient number, since it is larger than the sum of its proper divisors (29265815).

121243345 is an equidigital number, since it uses as much as digits as its factorization.

121243345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836195.

The product of its digits is 2880, while the sum is 25.

The square root of 121243345 is about 11011.0555806426. The cubic root of 121243345 is about 494.9400941006.

Adding to 121243345 its reverse (543342121), we get a palindrome (664585466).

The spelling of 121243345 in words is "one hundred twenty-one million, two hundred forty-three thousand, three hundred forty-five".