12899271 has 32 divisors (see below), whose sum is σ = 22579200. Its totient is φ = 6346080.

The previous prime is 12899267. The next prime is 12899281. The reversal of 12899271 is 17299821.

It is not a de Polignac number, because 12899271 - 2² = 12899267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2920 + ... + 5858.

It is an arithmetic number, because the mean of its divisors is an integer number (705600).

Almost surely, 2^12899271 is an apocalyptic number.

12899271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12899271 is a deficient number, since it is larger than the sum of its proper divisors (9679929).

12899271 is a wasteful number, since it uses less digits than its factorization.

12899271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979.

The product of its digits is 18144, while the sum is 39.

The square root of 12899271 is about 3591.5555125878. Note that the first 4 decimals coincide. The cubic root of 12899271 is about 234.5245919324.

It can be divided in two parts, 128 and 99271, that added together give a palindrome (99399).

The spelling of 12899271 in words is "twelve million, eight hundred ninety-nine thousand, two hundred seventy-one".