12943872 has 90 divisors (see below), whose sum is σ = 38075037. Its totient is φ = 4233216.

The previous prime is 12943867. The next prime is 12943873. The reversal of 12943872 is 27834921.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 12278016 + 665856 = 3504^2 + 816^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2544.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12943873) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 244198 + ... + 244250.

Almost surely, 2^12943872 is an apocalyptic number.

12943872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12943872

12943872 is an abundant number, since it is smaller than the sum of its proper divisors (25131165).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12943872 is an frugal number, since it uses more digits than its factorization.

12943872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 58 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 12943872 is about 3597.7593026772. The cubic root of 12943872 is about 234.7945813182.

The spelling of 12943872 in words is "twelve million, nine hundred forty-three thousand, eight hundred seventy-two".