13422581 has 2 divisors, whose sum is σ = 13422582. Its totient is φ = 13422580.

The previous prime is 13422533. The next prime is 13422599. The reversal of 13422581 is 18522431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 6584356 = 2615^2 + 2566^2 .

It is an emirp because it is prime and its reverse (18522431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13422581 - 2⁶ = 13422517 is a prime.

It is a super-2 number, since 2×13422581² = 360331361403122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13422581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13422281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6711290 + 6711291.

It is an arithmetic number, because the mean of its divisors is an integer number (6711291).

Almost surely, 2^13422581 is an apocalyptic number.

It is an amenable number.

13422581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13422581 is an equidigital number, since it uses as much as digits as its factorization.

13422581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 13422581 is about 3663.6840748078. The cubic root of 13422581 is about 237.6541182507.

The spelling of 13422581 in words is "thirteen million, four hundred twenty-two thousand, five hundred eighty-one".