12730861 has 16 divisors (see below), whose sum is σ = 15095808. Its totient is φ = 10584000.

The previous prime is 12730853. The next prime is 12730877. The reversal of 12730861 is 16803721.

It is a cyclic number.

It is not a de Polignac number, because 12730861 - 2³ = 12730853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17811 + ... + 18511.

It is an arithmetic number, because the mean of its divisors is an integer number (943488).

Almost surely, 2^12730861 is an apocalyptic number.

12730861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12730861 is a deficient number, since it is larger than the sum of its proper divisors (2364947).

12730861 is a wasteful number, since it uses less digits than its factorization.

12730861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 12730861 is about 3568.0332117288. The cubic root of 12730861 is about 233.4994841544.

The spelling of 12730861 in words is "twelve million, seven hundred thirty thousand, eight hundred sixty-one".