12721296 has 40 divisors (see below), whose sum is σ = 37559104. Its totient is φ = 3634560.

The previous prime is 12721273. The next prime is 12721333. The reversal of 12721296 is 69212721.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18595 + ... + 19266.

Almost surely, 2^12721296 is an apocalyptic number.

12721296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12721296 is an abundant number, since it is smaller than the sum of its proper divisors (24837808).

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

12721296 is a wasteful number, since it uses less digits than its factorization.

12721296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37879 (or 37873 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 12721296 is about 3566.6925855756. The cubic root of 12721296 is about 233.4409915895.

The spelling of 12721296 in words is "twelve million, seven hundred twenty-one thousand, two hundred ninety-six".