121543265 has 8 divisors (see below), whose sum is σ = 146069568. Its totient is φ = 97089520.

The previous prime is 121543237. The next prime is 121543271. The reversal of 121543265 is 562345121.

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

It is not a de Polignac number, because 121543265 - 2¹⁰ = 121542241 is a prime.

It is a Duffinian 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, 14381 + ... + 21210.

It is an arithmetic number, because the mean of its divisors is an integer number (18258696).

Almost surely, 2^121543265 is an apocalyptic number.

It is an amenable number.

121543265 is a deficient number, since it is larger than the sum of its proper divisors (24526303).

121543265 is an equidigital number, since it uses as much as digits as its factorization.

121543265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36279.

The product of its digits is 7200, while the sum is 29.

The square root of 121543265 is about 11024.6662080990. Note that the first 3 decimals coincide. The cubic root of 121543265 is about 495.3478696095.

Adding to 121543265 its reverse (562345121), we get a palindrome (683888386).

The spelling of 121543265 in words is "one hundred twenty-one million, five hundred forty-three thousand, two hundred sixty-five".