12915447 has 8 divisors (see below), whose sum is σ = 17238144. Its totient is φ = 8601528.

The previous prime is 12915439. The next prime is 12915493. The reversal of 12915447 is 74451921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12915447 - 2³ = 12915439 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2998 + ... + 5900.

It is an arithmetic number, because the mean of its divisors is an integer number (2154768).

Almost surely, 2^12915447 is an apocalyptic number.

12915447 is a deficient number, since it is larger than the sum of its proper divisors (4322697).

12915447 is a wasteful number, since it uses less digits than its factorization.

12915447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389.

The product of its digits is 10080, while the sum is 33.

The square root of 12915447 is about 3593.8067560736. The cubic root of 12915447 is about 234.6225841657.

It can be divided in two parts, 129 and 15447, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 12915447 in words is "twelve million, nine hundred fifteen thousand, four hundred forty-seven".