12872491 has 4 divisors (see below), whose sum is σ = 13316400. Its totient is φ = 12428584.

The previous prime is 12872473. The next prime is 12872507. The reversal of 12872491 is 19427821.

12872491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12872491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12872441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221911 + ... + 221968.

It is an arithmetic number, because the mean of its divisors is an integer number (3329100).

Almost surely, 2^12872491 is an apocalyptic number.

12872491 is a deficient number, since it is larger than the sum of its proper divisors (443909).

12872491 is an equidigital number, since it uses as much as digits as its factorization.

12872491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443908.

The product of its digits is 8064, while the sum is 34.

The square root of 12872491 is about 3587.8253859406. The cubic root of 12872491 is about 234.3621817227.

The spelling of 12872491 in words is "twelve million, eight hundred seventy-two thousand, four hundred ninety-one".