12894721 has 8 divisors (see below), whose sum is σ = 15603840. Its totient is φ = 10402368.

The previous prime is 12894709. The next prime is 12894731. The reversal of 12894721 is 12749821.

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

It is not a de Polignac number, because 12894721 - 2⁵ = 12894689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12894701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54061 + ... + 54298.

It is an arithmetic number, because the mean of its divisors is an integer number (1950480).

Almost surely, 2^12894721 is an apocalyptic number.

It is an amenable number.

12894721 is a deficient number, since it is larger than the sum of its proper divisors (2709119).

12894721 is a wasteful number, since it uses less digits than its factorization.

12894721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108383.

The product of its digits is 8064, while the sum is 34.

The square root of 12894721 is about 3590.9220264439. The cubic root of 12894721 is about 234.4970138266.

It can be divided in two parts, 128 and 94721, that added together give a palindrome (94849).

The spelling of 12894721 in words is "twelve million, eight hundred ninety-four thousand, seven hundred twenty-one".