13124621 has 2 divisors, whose sum is σ = 13124622. Its totient is φ = 13124620.

The previous prime is 13124593. The next prime is 13124623. The reversal of 13124621 is 12642131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 265225 = 3586^2 + 515^2 .

It is an emirp because it is prime and its reverse (12642131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13124621 - 2¹⁰ = 13123597 is a prime.

Together with 13124623, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13124593 and 13124602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13124623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562310 + 6562311.

It is an arithmetic number, because the mean of its divisors is an integer number (6562311).

Almost surely, 2^13124621 is an apocalyptic number.

It is an amenable number.

13124621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13124621 is an equidigital number, since it uses as much as digits as its factorization.

13124621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 13124621 is about 3622.7918792003. The cubic root of 13124621 is about 235.8824285101.

Adding to 13124621 its reverse (12642131), we get a palindrome (25766752).

The spelling of 13124621 in words is "thirteen million, one hundred twenty-four thousand, six hundred twenty-one".