12787722 has 48 divisors (see below), whose sum is σ = 29484000. Its totient is φ = 3994272.

The previous prime is 12787721. The next prime is 12787763. The reversal of 12787722 is 22778721.

It is not an unprimeable number, because it can be changed into a prime (12787721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47404 + ... + 47672.

It is an arithmetic number, because the mean of its divisors is an integer number (614250).

Almost surely, 2^12787722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12787722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14742000).

12787722 is an abundant number, since it is smaller than the sum of its proper divisors (16696278).

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

12787722 is a wasteful number, since it uses less digits than its factorization.

12787722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 432 counting only the distinct ones).

The product of its digits is 21952, while the sum is 36.

The square root of 12787722 is about 3575.9924496565. The cubic root of 12787722 is about 233.8466011926.

Subtracting 12787722 from its reverse (22778721), we obtain a palindrome (9990999).

The spelling of 12787722 in words is "twelve million, seven hundred eighty-seven thousand, seven hundred twenty-two".