12721446 has 12 divisors (see below), whose sum is σ = 27563172. Its totient is φ = 4240476.

The previous prime is 12721441. The next prime is 12721447. The reversal of 12721446 is 64412721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 353356 + ... + 353391.

It is an arithmetic number, because the mean of its divisors is an integer number (2296931).

Almost surely, 2^12721446 is an apocalyptic number.

12721446 is an abundant number, since it is smaller than the sum of its proper divisors (14841726).

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

12721446 is a wasteful number, since it uses less digits than its factorization.

12721446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706755 (or 706752 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 12721446 is about 3566.7136133982. The cubic root of 12721446 is about 233.4419091064.

It can be divided in two parts, 127214 and 46, that added together give a triangular number (127260 = T₅₀₄).

The spelling of 12721446 in words is "twelve million, seven hundred twenty-one thousand, four hundred forty-six".