13622261 has 4 divisors (see below), whose sum is σ = 13656972. Its totient is φ = 13587552.

The previous prime is 13622177. The next prime is 13622269. The reversal of 13622261 is 16222631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6599761 + 7022500 = 2569^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 13622261 - 2¹⁴ = 13605877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13622269) 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, 16760 + ... + 17553.

It is an arithmetic number, because the mean of its divisors is an integer number (3414243).

Almost surely, 2^13622261 is an apocalyptic number.

It is an amenable number.

13622261 is a deficient number, since it is larger than the sum of its proper divisors (34711).

13622261 is an equidigital number, since it uses as much as digits as its factorization.

13622261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34710.

The product of its digits is 864, while the sum is 23.

The square root of 13622261 is about 3690.8347294345. The cubic root of 13622261 is about 238.8268033197.

Adding to 13622261 its reverse (16222631), we get a palindrome (29844892).

The spelling of 13622261 in words is "thirteen million, six hundred twenty-two thousand, two hundred sixty-one".