12072515 has 32 divisors (see below), whose sum is σ = 18049920. Its totient is φ = 7592832.

The previous prime is 12072469. The next prime is 12072517. The reversal of 12072515 is 51527021.

It is a happy number.

It is not a de Polignac number, because 12072515 - 2¹⁸ = 11810371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12072517) 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 31 ways as a sum of consecutive naturals, for example, 76817 + ... + 76973.

It is an arithmetic number, because the mean of its divisors is an integer number (564060).

Almost surely, 2^12072515 is an apocalyptic number.

12072515 is a deficient number, since it is larger than the sum of its proper divisors (5977405).

12072515 is an equidigital number, since it uses as much as digits as its factorization.

12072515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12072515 is about 3474.5524891704. The cubic root of 12072515 is about 229.4030835495.

Adding to 12072515 its reverse (51527021), we get a palindrome (63599536).

The spelling of 12072515 in words is "twelve million, seventy-two thousand, five hundred fifteen".