12780272 has 20 divisors (see below), whose sum is σ = 25839120. Its totient is φ = 6112128.

The previous prime is 12780269. The next prime is 12780307. The reversal of 12780272 is 27208721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16997 + ... + 17732.

It is an arithmetic number, because the mean of its divisors is an integer number (1291956).

Almost surely, 2^12780272 is an apocalyptic number.

It is an amenable number.

12780272 is an abundant number, since it is smaller than the sum of its proper divisors (13058848).

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

12780272 is a wasteful number, since it uses less digits than its factorization.

12780272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34760 (or 34754 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12780272 is about 3574.9506290297. The cubic root of 12780272 is about 233.8011801341.

Adding to 12780272 its reverse (27208721), we get a palindrome (39988993).

The spelling of 12780272 in words is "twelve million, seven hundred eighty thousand, two hundred seventy-two".