11567261 has 2 divisors, whose sum is σ = 11567262. Its totient is φ = 11567260.

The previous prime is 11567221. The next prime is 11567263. The reversal of 11567261 is 16276511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 244036 = 3365^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 11567261 - 2²² = 7372957 is a prime.

It is a Sophie Germain prime.

Together with 11567263, 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 (11567263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783630 + 5783631.

It is an arithmetic number, because the mean of its divisors is an integer number (5783631).

Almost surely, 2^11567261 is an apocalyptic number.

It is an amenable number.

11567261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11567261 is an equidigital number, since it uses as much as digits as its factorization.

11567261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 29.

The square root of 11567261 is about 3401.0676264961. The cubic root of 11567261 is about 226.1570748699.

It can be divided in two parts, 115 and 67261, that added together give a palindrome (67376).

The spelling of 11567261 in words is "eleven million, five hundred sixty-seven thousand, two hundred sixty-one".