12721360 has 20 divisors (see below), whose sum is σ = 29577348. Its totient is φ = 5088512.

The previous prime is 12721333. The next prime is 12721361. The reversal of 12721360 is 6312721.

It can be written as a sum of positive squares in 2 ways, for example, as 6431296 + 6290064 = 2536^2 + 2508^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721361) 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, 79429 + ... + 79588.

Almost surely, 2^12721360 is an apocalyptic number.

12721360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12721360 is an abundant number, since it is smaller than the sum of its proper divisors (16855988).

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

12721360 is a wasteful number, since it uses less digits than its factorization.

12721360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159030 (or 159024 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 12721360 is about 3566.7015574617. The cubic root of 12721360 is about 233.4413830642.

The spelling of 12721360 in words is "twelve million, seven hundred twenty-one thousand, three hundred sixty".