12515149 has 4 divisors (see below), whose sum is σ = 12523900. Its totient is φ = 12506400.

The previous prime is 12515123. The next prime is 12515159. The reversal of 12515149 is 94151521.

12515149 = T₂₈₈₇ + T₂₈₈₈ + T₂₈₈₉.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 6215049 = 2510^2 + 2493^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515149 - 2⁵ = 12515117 is a prime.

It is a Duffinian number.

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 in 3 ways as a sum of consecutive naturals, for example, 1674 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (3130975).

Almost surely, 2^12515149 is an apocalyptic number.

12515149 is the 2889-th centered triangular number.

It is an amenable number.

12515149 is a deficient number, since it is larger than the sum of its proper divisors (8751).

12515149 is an equidigital number, since it uses as much as digits as its factorization.

12515149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750.

The product of its digits is 1800, while the sum is 28.

The square root of 12515149 is about 3537.6756493494. The cubic root of 12515149 is about 232.1731577377.

It can be divided in two parts, 1251 and 5149, that added together give a square (6400 = 80²).

The spelling of 12515149 in words is "twelve million, five hundred fifteen thousand, one hundred forty-nine".