121643065 has 8 divisors (see below), whose sum is σ = 146060928. Its totient is φ = 97254960.

The previous prime is 121643029. The next prime is 121643069. The reversal of 121643065 is 560346121.

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

It is not a de Polignac number, because 121643065 - 2⁹ = 121642553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121643069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2854 + ... + 15856.

It is an arithmetic number, because the mean of its divisors is an integer number (18257616).

Almost surely, 2^121643065 is an apocalyptic number.

It is an amenable number.

121643065 is a deficient number, since it is larger than the sum of its proper divisors (24417863).

121643065 is a wasteful number, since it uses less digits than its factorization.

121643065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14879.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 121643065 is about 11029.1914934867. The cubic root of 121643065 is about 495.4834103513.

Adding to 121643065 its reverse (560346121), we get a palindrome (681989186).

The spelling of 121643065 in words is "one hundred twenty-one million, six hundred forty-three thousand, sixty-five".