12780552 has 16 divisors (see below), whose sum is σ = 31951440. Its totient is φ = 4260176.

The previous prime is 12780539. The next prime is 12780553. The reversal of 12780552 is 25508721.

It is not an unprimeable number, because it can be changed into a prime (12780553) 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, 266238 + ... + 266285.

It is an arithmetic number, because the mean of its divisors is an integer number (1996965).

Almost surely, 2^12780552 is an apocalyptic number.

12780552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12780552 is an abundant number, since it is smaller than the sum of its proper divisors (19170888).

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

12780552 is a wasteful number, since it uses less digits than its factorization.

12780552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532532 (or 532528 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 12780552 is about 3574.9897901952. The cubic root of 12780552 is about 233.8028875535.

The spelling of 12780552 in words is "twelve million, seven hundred eighty thousand, five hundred fifty-two".