12622261 has 4 divisors (see below), whose sum is σ = 12644352. Its totient is φ = 12600172.

The previous prime is 12622223. The next prime is 12622271. The reversal of 12622261 is 16222621.

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: 16222621 = 1459 ⋅11119.

It is a cyclic number.

It is not a de Polignac number, because 12622261 - 2⁷ = 12622133 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 (12622201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10165 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (3161088).

Almost surely, 2^12622261 is an apocalyptic number.

It is an amenable number.

12622261 is a deficient number, since it is larger than the sum of its proper divisors (22091).

12622261 is an equidigital number, since it uses as much as digits as its factorization.

12622261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22090.

The product of its digits is 576, while the sum is 22.

The square root of 12622261 is about 3552.7821492459. The cubic root of 12622261 is about 232.8336351637.

Adding to 12622261 its reverse (16222621), we get a palindrome (28844882).

It can be divided in two parts, 1 and 2622261, that added together give a palindrome (2622262).

The spelling of 12622261 in words is "twelve million, six hundred twenty-two thousand, two hundred sixty-one".