12872641 has 4 divisors (see below), whose sum is σ = 12890800. Its totient is φ = 12854484.

The previous prime is 12872627. The next prime is 12872653. The reversal of 12872641 is 14627821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14627821 = 13 ⋅1125217.

It is a cyclic number.

It is not a de Polignac number, because 12872641 - 2¹⁷ = 12741569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12872611) 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 3 ways as a sum of consecutive naturals, for example, 7971 + ... + 9448.

It is an arithmetic number, because the mean of its divisors is an integer number (3222700).

Almost surely, 2^12872641 is an apocalyptic number.

It is an amenable number.

12872641 is a deficient number, since it is larger than the sum of its proper divisors (18159).

12872641 is an equidigital number, since it uses as much as digits as its factorization.

12872641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18158.

The product of its digits is 5376, while the sum is 31.

The square root of 12872641 is about 3587.8462899071. The cubic root of 12872641 is about 234.3630920409.

The spelling of 12872641 in words is "twelve million, eight hundred seventy-two thousand, six hundred forty-one".