12515047 has 4 divisors (see below), whose sum is σ = 12686560. Its totient is φ = 12343536.

The previous prime is 12515039. The next prime is 12515071. The reversal of 12515047 is 74051521.

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 12515047 - 2³ = 12515039 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 (12515647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85647 + ... + 85792.

It is an arithmetic number, because the mean of its divisors is an integer number (3171640).

Almost surely, 2^12515047 is an apocalyptic number.

12515047 is a deficient number, since it is larger than the sum of its proper divisors (171513).

12515047 is an equidigital number, since it uses as much as digits as its factorization.

12515047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171512.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 12515047 is about 3537.6612330748. The cubic root of 12515047 is about 232.1725269894.

Adding to 12515047 its reverse (74051521), we get a palindrome (86566568).

The spelling of 12515047 in words is "twelve million, five hundred fifteen thousand, forty-seven".