121540475 has 24 divisors (see below), whose sum is σ = 172988928. Its totient is φ = 82980000.

The previous prime is 121540459. The next prime is 121540477. The reversal of 121540475 is 574045121.

It is not a de Polignac number, because 121540475 - 2⁴ = 121540459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121540477) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 42542 + ... + 45308.

It is an arithmetic number, because the mean of its divisors is an integer number (7207872).

Almost surely, 2^121540475 is an apocalyptic number.

121540475 is a deficient number, since it is larger than the sum of its proper divisors (51448453).

121540475 is a wasteful number, since it uses less digits than its factorization.

121540475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035 (or 3030 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 121540475 is about 11024.5396729297. The cubic root of 121540475 is about 495.3440793786.

Adding to 121540475 its reverse (574045121), we get a palindrome (695585596).

The spelling of 121540475 in words is "one hundred twenty-one million, five hundred forty thousand, four hundred seventy-five".