121413515 has 16 divisors (see below), whose sum is σ = 158315520. Its totient is φ = 89048160.

The previous prime is 121413511. The next prime is 121413521. The reversal of 121413515 is 515314121.

It is not a de Polignac number, because 121413515 - 2² = 121413511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121413511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17669 + ... + 23558.

It is an arithmetic number, because the mean of its divisors is an integer number (9894720).

Almost surely, 2^121413515 is an apocalyptic number.

121413515 is a deficient number, since it is larger than the sum of its proper divisors (36902005).

121413515 is a wasteful number, since it uses less digits than its factorization.

121413515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41282.

The product of its digits is 600, while the sum is 23.

The square root of 121413515 is about 11018.7801048936. The cubic root of 121413515 is about 495.1715420825.

Adding to 121413515 its reverse (515314121), we get a palindrome (636727636).

The spelling of 121413515 in words is "one hundred twenty-one million, four hundred thirteen thousand, five hundred fifteen".