121504005 has 48 divisors (see below), whose sum is σ = 241488000. Its totient is φ = 55361664.

The previous prime is 121503971. The next prime is 121504007. The reversal of 121504005 is 500405121.

It is not a de Polignac number, because 121504005 - 2⁸ = 121503749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121504007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156799 + ... + 157571.

It is an arithmetic number, because the mean of its divisors is an integer number (5031000).

Almost surely, 2^121504005 is an apocalyptic number.

121504005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121504005 is a deficient number, since it is larger than the sum of its proper divisors (119983995).

121504005 is a wasteful number, since it uses less digits than its factorization.

121504005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 121504005 is about 11022.8855115165. The cubic root of 121504005 is about 495.2945293397.

Adding to 121504005 its reverse (500405121), we get a palindrome (621909126).

The spelling of 121504005 in words is "one hundred twenty-one million, five hundred four thousand, five".