12961847 has 4 divisors (see below), whose sum is σ = 13004376. Its totient is φ = 12919320.

The previous prime is 12961843. The next prime is 12961849. The reversal of 12961847 is 74816921.

12961847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74816921 = 3169 ⋅23609.

It is a cyclic number.

It is not a de Polignac number, because 12961847 - 2² = 12961843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12961847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961841) 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, 20804 + ... + 21417.

It is an arithmetic number, because the mean of its divisors is an integer number (3251094).

Almost surely, 2^12961847 is an apocalyptic number.

12961847 is a deficient number, since it is larger than the sum of its proper divisors (42529).

12961847 is an equidigital number, since it uses as much as digits as its factorization.

12961847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42528.

The product of its digits is 24192, while the sum is 38.

The square root of 12961847 is about 3600.2565186386. The cubic root of 12961847 is about 234.9032165212.

The spelling of 12961847 in words is "twelve million, nine hundred sixty-one thousand, eight hundred forty-seven".