12780144 has 60 divisors (see below), whose sum is σ = 38523576. Its totient is φ = 3931776.

The previous prime is 12780143. The next prime is 12780149. The reversal of 12780144 is 44108721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1542 + ... + 5285.

Almost surely, 2^12780144 is an apocalyptic number.

It is an amenable number.

12780144 is an abundant number, since it is smaller than the sum of its proper divisors (25743432).

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

12780144 is a wasteful number, since it uses less digits than its factorization.

12780144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854 (or 6845 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 12780144 is about 3574.9327266398. The cubic root of 12780144 is about 233.8003995912.

Adding to 12780144 its reverse (44108721), we get a palindrome (56888865).

The spelling of 12780144 in words is "twelve million, seven hundred eighty thousand, one hundred forty-four".