11347561 has 2 divisors, whose sum is σ = 11347562. Its totient is φ = 11347560.

The previous prime is 11347559. The next prime is 11347591. The reversal of 11347561 is 16574311.

11347561 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., 11323225 + 24336 = 3365^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 11347561 - 2¹ = 11347559 is a prime.

Together with 11347559, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₄₇₉₁₀ and since 11347561 and 747910 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11347591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5673780 + 5673781.

It is an arithmetic number, because the mean of its divisors is an integer number (5673781).

Almost surely, 2^11347561 is an apocalyptic number.

It is an amenable number.

11347561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11347561 is an equidigital number, since it uses as much as digits as its factorization.

11347561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 11347561 is about 3368.6141067210. The cubic root of 11347561 is about 224.7160929430.

It can be divided in two parts, 113 and 47561, that added together give a palindrome (47674).

The spelling of 11347561 in words is "eleven million, three hundred forty-seven thousand, five hundred sixty-one".