12125515 has 8 divisors (see below), whose sum is σ = 15316560. Its totient is φ = 9189792.

The previous prime is 12125497. The next prime is 12125521. The reversal of 12125515 is 51552121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12125515 - 2¹¹ = 12123467 is a prime.

It is a super-2 number, since 2×12125515² = 294056228030450, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63724 + ... + 63913.

It is an arithmetic number, because the mean of its divisors is an integer number (1914570).

Almost surely, 2^12125515 is an apocalyptic number.

12125515 is a deficient number, since it is larger than the sum of its proper divisors (3191045).

12125515 is a wasteful number, since it uses less digits than its factorization.

12125515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127661.

The product of its digits is 500, while the sum is 22.

The square root of 12125515 is about 3482.1710182011. The cubic root of 12125515 is about 229.7382971704.

Adding to 12125515 its reverse (51552121), we get a palindrome (63677636).

The spelling of 12125515 in words is "twelve million, one hundred twenty-five thousand, five hundred fifteen".