12891873 has 24 divisors (see below), whose sum is σ = 18324768. Its totient is φ = 8055936.

The previous prime is 12891871. The next prime is 12891881. The reversal of 12891873 is 37819821.

12891873 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12891873 - 2¹ = 12891871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12891871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176565 + ... + 176637.

It is an arithmetic number, because the mean of its divisors is an integer number (763532).

Almost surely, 2^12891873 is an apocalyptic number.

It is an amenable number.

12891873 is a deficient number, since it is larger than the sum of its proper divisors (5432895).

12891873 is an equidigital number, since it uses as much as digits as its factorization.

12891873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 156 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 12891873 is about 3590.5254490116. The cubic root of 12891873 is about 234.4797484493.

The spelling of 12891873 in words is "twelve million, eight hundred ninety-one thousand, eight hundred seventy-three".