12921343 has 4 divisors (see below), whose sum is σ = 13681440. Its totient is φ = 12161248.

The previous prime is 12921329. The next prime is 12921373. The reversal of 12921343 is 34312921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34312921 = 4583 ⋅7487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12921343 is a prime.

It is a super-2 number, since 2×12921343² = 333922209847298, 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 (12921373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380023 + ... + 380056.

It is an arithmetic number, because the mean of its divisors is an integer number (3420360).

Almost surely, 2^12921343 is an apocalyptic number.

12921343 is a deficient number, since it is larger than the sum of its proper divisors (760097).

12921343 is an equidigital number, since it uses as much as digits as its factorization.

12921343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760096.

The product of its digits is 1296, while the sum is 25.

The square root of 12921343 is about 3594.6269625651. The cubic root of 12921343 is about 234.6582810669.

The spelling of 12921343 in words is "twelve million, nine hundred twenty-one thousand, three hundred forty-three".