12787251 has 4 divisors (see below), whose sum is σ = 17049672. Its totient is φ = 8524832.

The previous prime is 12787207. The next prime is 12787267. The reversal of 12787251 is 15278721.

12787251 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 not a de Polignac number, because 12787251 - 2¹¹ = 12785203 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (12787051) 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, 2131206 + ... + 2131211.

It is an arithmetic number, because the mean of its divisors is an integer number (4262418).

Almost surely, 2^12787251 is an apocalyptic number.

12787251 is a deficient number, since it is larger than the sum of its proper divisors (4262421).

12787251 is an equidigital number, since it uses as much as digits as its factorization.

12787251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262420.

The product of its digits is 7840, while the sum is 33.

The square root of 12787251 is about 3575.9265932063. The cubic root of 12787251 is about 233.8437301287.

It can be divided in two parts, 127 and 87251, that added together give a palindrome (87378).

The spelling of 12787251 in words is "twelve million, seven hundred eighty-seven thousand, two hundred fifty-one".