12780530 has 16 divisors (see below), whose sum is σ = 26291520. Its totient is φ = 4381872.

The previous prime is 12780527. The next prime is 12780539. The reversal of 12780530 is 3508721.

It is a self number, because there is not a number n which added to its sum of digits gives 12780530.

It is not an unprimeable number, because it can be changed into a prime (12780539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91220 + ... + 91359.

It is an arithmetic number, because the mean of its divisors is an integer number (1643220).

Almost surely, 2^12780530 is an apocalyptic number.

12780530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12780530 is an abundant number, since it is smaller than the sum of its proper divisors (13510990).

12780530 is a wasteful number, since it uses less digits than its factorization.

12780530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182593.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 12780530 is about 3574.9867132620. The cubic root of 12780530 is about 233.8027534000.

The spelling of 12780530 in words is "twelve million, seven hundred eighty thousand, five hundred thirty".