121305504 has 24 divisors (see below), whose sum is σ = 318427200. Its totient is φ = 40435136.

The previous prime is 121305493. The next prime is 121305517. The reversal of 121305504 is 405503121.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631704 + ... + 631895.

It is an arithmetic number, because the mean of its divisors is an integer number (13267800).

Almost surely, 2^121305504 is an apocalyptic number.

It is an amenable number.

121305504 is an abundant number, since it is smaller than the sum of its proper divisors (197121696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121305504 is a wasteful number, since it uses less digits than its factorization.

121305504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263612 (or 1263604 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 121305504 is about 11013.8777912232. The cubic root of 121305504 is about 495.0246615608.

Adding to 121305504 its reverse (405503121), we get a palindrome (526808625).

The spelling of 121305504 in words is "one hundred twenty-one million, three hundred five thousand, five hundred four".