12576321 has 12 divisors (see below), whose sum is σ = 18222672. Its totient is φ = 8357976.

The previous prime is 12576313. The next prime is 12576349. The reversal of 12576321 is 12367521.

It is a happy number.

12576321 is a `hidden beast` number, since 1 + 25 + 7 + 632 + 1 = 666.

It is not a de Polignac number, because 12576321 - 2³ = 12576313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12576371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1110 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (1518556).

Almost surely, 2^12576321 is an apocalyptic number.

It is an amenable number.

12576321 is a deficient number, since it is larger than the sum of its proper divisors (5646351).

12576321 is a wasteful number, since it uses less digits than its factorization.

12576321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380 (or 4377 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12576321 is about 3546.3109000763. The cubic root of 12576321 is about 232.5508178894.

It can be divided in two parts, 1257 and 6321, that multiplied together give a palindrome (7945497).

The spelling of 12576321 in words is "twelve million, five hundred seventy-six thousand, three hundred twenty-one".