11009261 has 2 divisors, whose sum is σ = 11009262. Its totient is φ = 11009260.

The previous prime is 11009191. The next prime is 11009263. The reversal of 11009261 is 16290011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7946761 + 3062500 = 2819^2 + 1750^2 .

It is a cyclic number.

It is not a de Polignac number, because 11009261 - 2¹⁸ = 10747117 is a prime.

It is a super-2 number, since 2×11009261² = 242407655532242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 11009263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11009263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5504630 + 5504631.

It is an arithmetic number, because the mean of its divisors is an integer number (5504631).

Almost surely, 2^11009261 is an apocalyptic number.

It is an amenable number.

11009261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11009261 is an equidigital number, since it uses as much as digits as its factorization.

11009261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 11009261 is about 3318.0206449026. The cubic root of 11009261 is about 222.4604045183.

Adding to 11009261 its reverse (16290011), we get a palindrome (27299272).

The spelling of 11009261 in words is "eleven million, nine thousand, two hundred sixty-one".