11656261 has 2 divisors, whose sum is σ = 11656262. Its totient is φ = 11656260.

The previous prime is 11656181. The next prime is 11656277. The reversal of 11656261 is 16265611.

11656261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10857025 + 799236 = 3295^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 11656261 - 2¹¹ = 11654213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11656061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828130 + 5828131.

It is an arithmetic number, because the mean of its divisors is an integer number (5828131).

Almost surely, 2^11656261 is an apocalyptic number.

It is an amenable number.

11656261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656261 is an equidigital number, since it uses as much as digits as its factorization.

11656261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 11656261 is about 3414.1266818910. The cubic root of 11656261 is about 226.7356208418.

The spelling of 11656261 in words is "eleven million, six hundred fifty-six thousand, two hundred sixty-one".