12749887 has 4 divisors (see below), whose sum is σ = 13046440. Its totient is φ = 12453336.

The previous prime is 12749861. The next prime is 12749917. The reversal of 12749887 is 78894721.

12749887 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-12749887 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 (12749827) 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, 148212 + ... + 148297.

It is an arithmetic number, because the mean of its divisors is an integer number (3261610).

Almost surely, 2^12749887 is an apocalyptic number.

12749887 is a deficient number, since it is larger than the sum of its proper divisors (296553).

12749887 is an equidigital number, since it uses as much as digits as its factorization.

12749887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296552.

The product of its digits is 225792, while the sum is 46.

The square root of 12749887 is about 3570.6983910714. The cubic root of 12749887 is about 233.6157462547.

The spelling of 12749887 in words is "twelve million, seven hundred forty-nine thousand, eight hundred eighty-seven".