12899736 has 80 divisors (see below), whose sum is σ = 38289240. Its totient is φ = 4043520.

The previous prime is 12899713. The next prime is 12899737. The reversal of 12899736 is 63799821.

It is a junction number, because it is equal to n+sod(n) for n = 12899691 and 12899700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899737) 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 19 ways as a sum of consecutive naturals, for example, 10431 + ... + 11601.

Almost surely, 2^12899736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12899736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19144620).

12899736 is an abundant number, since it is smaller than the sum of its proper divisors (25389504).

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

12899736 is a wasteful number, since it uses less digits than its factorization.

12899736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1193 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 12899736 is about 3591.6202471865. The cubic root of 12899736 is about 234.5274099890.

It can be divided in two parts, 1289 and 9736, that added together give a square (11025 = 105²).

The spelling of 12899736 in words is "twelve million, eight hundred ninety-nine thousand, seven hundred thirty-six".