13621241 has 2 divisors, whose sum is σ = 13621242. Its totient is φ = 13621240.

The previous prime is 13621219. The next prime is 13621243. The reversal of 13621241 is 14212631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 1371241 = 3500^2 + 1171^2 .

It is an emirp because it is prime and its reverse (14212631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13621241 is a prime.

Together with 13621243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13621243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810620 + 6810621.

It is an arithmetic number, because the mean of its divisors is an integer number (6810621).

Almost surely, 2^13621241 is an apocalyptic number.

It is an amenable number.

13621241 is a deficient number, since it is larger than the sum of its proper divisors (1).

13621241 is an equidigital number, since it uses as much as digits as its factorization.

13621241 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 13621241 is about 3690.6965467239. The cubic root of 13621241 is about 238.8208422579.

Adding to 13621241 its reverse (14212631), we get a palindrome (27833872).

The spelling of 13621241 in words is "thirteen million, six hundred twenty-one thousand, two hundred forty-one".