11622581 has 2 divisors, whose sum is σ = 11622582. Its totient is φ = 11622580.

The previous prime is 11622571. The next prime is 11622601. The reversal of 11622581 is 18522611.

11622581 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., 8031556 + 3591025 = 2834^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 11622581 - 2⁶ = 11622517 is a prime.

It is a super-2 number, since 2×11622581² = 270168778203122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11622581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11622571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5811290 + 5811291.

It is an arithmetic number, because the mean of its divisors is an integer number (5811291).

Almost surely, 2^11622581 is an apocalyptic number.

It is an amenable number.

11622581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11622581 is an equidigital number, since it uses as much as digits as its factorization.

11622581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 11622581 is about 3409.1906664192. The cubic root of 11622581 is about 226.5170309483.

The spelling of 11622581 in words is "eleven million, six hundred twenty-two thousand, five hundred eighty-one".