12732397 has 4 divisors (see below), whose sum is σ = 12745980. Its totient is φ = 12718816.

The previous prime is 12732389. The next prime is 12732407. The reversal of 12732397 is 79323721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79323721 = 569 ⋅139409.

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 6651241 = 2466^2 + 2579^2 .

It is a cyclic number.

It is not a de Polignac number, because 12732397 - 2³ = 12732389 is a prime.

It is a super-2 number, since 2×12732397² = 324227866731218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12732367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5272 + ... + 7297.

It is an arithmetic number, because the mean of its divisors is an integer number (3186495).

Almost surely, 2^12732397 is an apocalyptic number.

It is an amenable number.

12732397 is a deficient number, since it is larger than the sum of its proper divisors (13583).

12732397 is a wasteful number, since it uses less digits than its factorization.

12732397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13582.

The product of its digits is 15876, while the sum is 34.

The square root of 12732397 is about 3568.2484498700. The cubic root of 12732397 is about 233.5088744799.

The spelling of 12732397 in words is "twelve million, seven hundred thirty-two thousand, three hundred ninety-seven".