12543280 has 80 divisors (see below), whose sum is σ = 32301504. Its totient is φ = 4505600.

The previous prime is 12543277. The next prime is 12543301. The reversal of 12543280 is 8234521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31080 + ... + 31480.

Almost surely, 2^12543280 is an apocalyptic number.

12543280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12543280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16150752).

12543280 is an abundant number, since it is smaller than the sum of its proper divisors (19758224).

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

12543280 is a wasteful number, since it uses less digits than its factorization.

12543280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 12543280 is about 3541.6493332909. The cubic root of 12543280 is about 232.3469837582.

The spelling of 12543280 in words is "twelve million, five hundred forty-three thousand, two hundred eighty".