12779874 has 48 divisors (see below), whose sum is σ = 29402880. Its totient is φ = 4004640.

The previous prime is 12779861. The next prime is 12779917. The reversal of 12779874 is 47897721.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20337 + ... + 20955.

It is an arithmetic number, because the mean of its divisors is an integer number (612560).

Almost surely, 2^12779874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12779874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14701440).

12779874 is an abundant number, since it is smaller than the sum of its proper divisors (16623006).

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

12779874 is a wasteful number, since it uses less digits than its factorization.

12779874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 692 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 12779874 is about 3574.8949634919. The cubic root of 12779874 is about 233.7987531165.

The spelling of 12779874 in words is "twelve million, seven hundred seventy-nine thousand, eight hundred seventy-four".