12621313 has 4 divisors (see below), whose sum is σ = 12662208. Its totient is φ = 12580420.

The previous prime is 12621307. The next prime is 12621337. The reversal of 12621313 is 31312621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31312621 = 521 ⋅60101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12621313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12621353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19981 + ... + 20602.

It is an arithmetic number, because the mean of its divisors is an integer number (3165552).

Almost surely, 2^12621313 is an apocalyptic number.

It is an amenable number.

12621313 is a deficient number, since it is larger than the sum of its proper divisors (40895).

12621313 is an equidigital number, since it uses as much as digits as its factorization.

12621313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40894.

The product of its digits is 216, while the sum is 19.

The square root of 12621313 is about 3552.6487301730. The cubic root of 12621313 is about 232.8278059964.

Adding to 12621313 its reverse (31312621), we get a palindrome (43933934).

The spelling of 12621313 in words is "twelve million, six hundred twenty-one thousand, three hundred thirteen".