12736861 has 8 divisors (see below), whose sum is σ = 13168800. Its totient is φ = 12312240.

The previous prime is 12736847. The next prime is 12736873. The reversal of 12736861 is 16863721.

12736861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12736861 - 2¹⁵ = 12704093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12736811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830 + ... + 5368.

It is an arithmetic number, because the mean of its divisors is an integer number (1646100).

Almost surely, 2^12736861 is an apocalyptic number.

It is an amenable number.

12736861 is a deficient number, since it is larger than the sum of its proper divisors (431939).

12736861 is an equidigital number, since it uses as much as digits as its factorization.

12736861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659.

The product of its digits is 12096, while the sum is 34.

The square root of 12736861 is about 3568.8739120344. The cubic root of 12736861 is about 233.5361608272.

The spelling of 12736861 in words is "twelve million, seven hundred thirty-six thousand, eight hundred sixty-one".