121345643 has 8 divisors (see below), whose sum is σ = 130402512. Its totient is φ = 112502016.

The previous prime is 121345633. The next prime is 121345649. The reversal of 121345643 is 346543121.

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 121345643 - 2¹⁴ = 121329259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121345649) 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 7 ways as a sum of consecutive naturals, for example, 52130 + ... + 54407.

It is an arithmetic number, because the mean of its divisors is an integer number (16300314).

Almost surely, 2^121345643 is an apocalyptic number.

121345643 is a deficient number, since it is larger than the sum of its proper divisors (9056869).

121345643 is a wasteful number, since it uses less digits than its factorization.

121345643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106621.

The product of its digits is 8640, while the sum is 29.

The square root of 121345643 is about 11015.6998415897. The cubic root of 121345643 is about 495.0792554115.

Adding to 121345643 its reverse (346543121), we get a palindrome (467888764).

The spelling of 121345643 in words is "one hundred twenty-one million, three hundred forty-five thousand, six hundred forty-three".