12709280 has 24 divisors (see below), whose sum is σ = 30026052. Its totient is φ = 5083648.

The previous prime is 12709267. The next prime is 12709313. The reversal of 12709280 is 8290721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12475024 + 234256 = 3532^2 + 484^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39557 + ... + 39876.

Almost surely, 2^12709280 is an apocalyptic number.

12709280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12709280 is an abundant number, since it is smaller than the sum of its proper divisors (17316772).

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

12709280 is an equidigital number, since it uses as much as digits as its factorization.

12709280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79448 (or 79440 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 12709280 is about 3565.0077138766. The cubic root of 12709280 is about 233.3674689288.

The spelling of 12709280 in words is "twelve million, seven hundred nine thousand, two hundred eighty".