12523015 has 4 divisors (see below), whose sum is σ = 15027624. Its totient is φ = 10018408.

The previous prime is 12522973. The next prime is 12523073. The reversal of 12523015 is 51032521.

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

It is a cyclic number.

It is not a de Polignac number, because 12523015 - 2¹¹ = 12520967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12522983 and 12523001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252297 + ... + 1252306.

It is an arithmetic number, because the mean of its divisors is an integer number (3756906).

Almost surely, 2^12523015 is an apocalyptic number.

12523015 is a deficient number, since it is larger than the sum of its proper divisors (2504609).

12523015 is an equidigital number, since it uses as much as digits as its factorization.

12523015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504608.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 12523015 is about 3538.7872216340. The cubic root of 12523015 is about 232.2217892422.

Adding to 12523015 its reverse (51032521), we get a palindrome (63555536).

The spelling of 12523015 in words is "twelve million, five hundred twenty-three thousand, fifteen".