121543535 has 8 divisors (see below), whose sum is σ = 146222016. Its totient is φ = 96988320.

The previous prime is 121543517. The next prime is 121543573. The reversal of 121543535 is 535345121.

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

It is not a de Polignac number, because 121543535 - 2¹⁶ = 121477999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121543498 and 121543507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28631 + ... + 32600.

It is an arithmetic number, because the mean of its divisors is an integer number (18277752).

Almost surely, 2^121543535 is an apocalyptic number.

121543535 is a deficient number, since it is larger than the sum of its proper divisors (24678481).

121543535 is an equidigital number, since it uses as much as digits as its factorization.

121543535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61633.

The product of its digits is 9000, while the sum is 29.

The square root of 121543535 is about 11024.6784533609. The cubic root of 121543535 is about 495.3482364030.

Adding to 121543535 its reverse (535345121), we get a palindrome (656888656).

The spelling of 121543535 in words is "one hundred twenty-one million, five hundred forty-three thousand, five hundred thirty-five".