12697321 has 24 divisors (see below), whose sum is σ = 16445184. Its totient is φ = 9707040.

The previous prime is 12697313. The next prime is 12697343. The reversal of 12697321 is 12379621.

12697321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12697321 - 2³ = 12697313 is a prime.

It is a super-2 number, since 2×12697321² = 322443921154082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (12697021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19426 + ... + 20068.

It is an arithmetic number, because the mean of its divisors is an integer number (685216).

Almost surely, 2^12697321 is an apocalyptic number.

It is an amenable number.

12697321 is a deficient number, since it is larger than the sum of its proper divisors (3747863).

12697321 is a wasteful number, since it uses less digits than its factorization.

12697321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 694 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 12697321 is about 3563.3300436530. The cubic root of 12697321 is about 233.2942490091.

The spelling of 12697321 in words is "twelve million, six hundred ninety-seven thousand, three hundred twenty-one".