12745280 has 28 divisors (see below), whose sum is σ = 30350460. Its totient is φ = 5097984.

The previous prime is 12745259. The next prime is 12745283. The reversal of 12745280 is 8254721.

It can be written as a sum of positive squares in 2 ways, for example, as 8809024 + 3936256 = 2968^2 + 1984^2 .

It is not an unprimeable number, because it can be changed into a prime (12745283) 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, 19595 + ... + 20234.

It is an arithmetic number, because the mean of its divisors is an integer number (1083945).

Almost surely, 2^12745280 is an apocalyptic number.

12745280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12745280 is an abundant number, since it is smaller than the sum of its proper divisors (17605180).

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

12745280 is an equidigital number, since it uses as much as digits as its factorization.

12745280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39846 (or 39836 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12745280 is about 3570.0532208918. The cubic root of 12745280 is about 233.5876048968.

The spelling of 12745280 in words is "twelve million, seven hundred forty-five thousand, two hundred eighty".