12721255 has 8 divisors (see below), whose sum is σ = 15590592. Its totient is φ = 9960288.

The previous prime is 12721217. The next prime is 12721271. The reversal of 12721255 is 55212721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12721255 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 26832 + ... + 27301.

It is an arithmetic number, because the mean of its divisors is an integer number (1948824).

Almost surely, 2^12721255 is an apocalyptic number.

12721255 is a deficient number, since it is larger than the sum of its proper divisors (2869337).

12721255 is an equidigital number, since it uses as much as digits as its factorization.

12721255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54185.

The product of its digits is 1400, while the sum is 25.

The square root of 12721255 is about 3566.6868379492. The cubic root of 12721255 is about 233.4407408003.

Adding to 12721255 its reverse (55212721), we get a palindrome (67933976).

The spelling of 12721255 in words is "twelve million, seven hundred twenty-one thousand, two hundred fifty-five".