12515158 has 4 divisors (see below), whose sum is σ = 18772740. Its totient is φ = 6257578.

The previous prime is 12515123. The next prime is 12515159. The reversal of 12515158 is 85151521.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515159) 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 as a sum of consecutive naturals, namely, 3128788 + ... + 3128791.

It is an arithmetic number, because the mean of its divisors is an integer number (4693185).

Almost surely, 2^12515158 is an apocalyptic number.

12515158 is a deficient number, since it is larger than the sum of its proper divisors (6257582).

12515158 is an equidigital number, since it uses as much as digits as its factorization.

12515158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257581.

The product of its digits is 2000, while the sum is 28.

The square root of 12515158 is about 3537.6769213709. The cubic root of 12515158 is about 232.1732133918.

Adding to 12515158 its reverse (85151521), we get a palindrome (97666679).

The spelling of 12515158 in words is "twelve million, five hundred fifteen thousand, one hundred fifty-eight".