12899287 has 4 divisors (see below), whose sum is σ = 13344120. Its totient is φ = 12454456.

The previous prime is 12899281. The next prime is 12899303. The reversal of 12899287 is 78299821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78299821 = 163 ⋅480367.

It is a de Polignac number, because none of the positive numbers 2^k-12899287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899281) 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, 222373 + ... + 222430.

It is an arithmetic number, because the mean of its divisors is an integer number (3336030).

Almost surely, 2^12899287 is an apocalyptic number.

12899287 is a deficient number, since it is larger than the sum of its proper divisors (444833).

12899287 is an equidigital number, since it uses as much as digits as its factorization.

12899287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444832.

The product of its digits is 145152, while the sum is 46.

The square root of 12899287 is about 3591.5577400343. The cubic root of 12899287 is about 234.5246888989.

The spelling of 12899287 in words is "twelve million, eight hundred ninety-nine thousand, two hundred eighty-seven".