12721074 has 16 divisors (see below), whose sum is σ = 25495680. Its totient is φ = 4231440.

The previous prime is 12721043. The next prime is 12721087. The reversal of 12721074 is 47012721.

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

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, 1287 + ... + 5205.

It is an arithmetic number, because the mean of its divisors is an integer number (1593480).

Almost surely, 2^12721074 is an apocalyptic number.

12721074 is an abundant number, since it is smaller than the sum of its proper divisors (12774606).

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

12721074 is a wasteful number, since it uses less digits than its factorization.

12721074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 12721074 is about 3566.6614641707. The cubic root of 12721074 is about 233.4396336513.

Adding to 12721074 its reverse (47012721), we get a palindrome (59733795).

It can be divided in two parts, 1272 and 1074, that added together give a triangular number (2346 = T₆₈).

The spelling of 12721074 in words is "twelve million, seven hundred twenty-one thousand, seventy-four".