13621253 has 2 divisors, whose sum is σ = 13621254. Its totient is φ = 13621252.

The previous prime is 13621247. The next prime is 13621261. The reversal of 13621253 is 35212631.

13621253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12271009 + 1350244 = 3503^2 + 1162^2 .

It is an emirp because it is prime and its reverse (35212631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13621253 - 2⁶ = 13621189 is a prime.

It is a Chen prime.

It is a congruent number.

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, 6810626 + 6810627.

It is an arithmetic number, because the mean of its divisors is an integer number (6810627).

Almost surely, 2^13621253 is an apocalyptic number.

It is an amenable number.

13621253 is a deficient number, since it is larger than the sum of its proper divisors (1).

13621253 is an equidigital number, since it uses as much as digits as its factorization.

13621253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 13621253 is about 3690.6981724330. The cubic root of 13621253 is about 238.8209123898.

Adding to 13621253 its reverse (35212631), we get a palindrome (48833884).

The spelling of 13621253 in words is "thirteen million, six hundred twenty-one thousand, two hundred fifty-three".