11561449 has 2 divisors, whose sum is σ = 11561450. Its totient is φ = 11561448.

The previous prime is 11561447. The next prime is 11561461. The reversal of 11561449 is 94416511.

11561449 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., 10036224 + 1525225 = 3168^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 11561449 - 2¹ = 11561447 is a prime.

Together with 11561447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11561449.

It is not a weakly prime, because it can be changed into another prime (11561447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780724 + 5780725.

It is an arithmetic number, because the mean of its divisors is an integer number (5780725).

Almost surely, 2^11561449 is an apocalyptic number.

It is an amenable number.

11561449 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561449 is an equidigital number, since it uses as much as digits as its factorization.

11561449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 11561449 is about 3400.2130815583. The cubic root of 11561449 is about 226.1191907898.

The spelling of 11561449 in words is "eleven million, five hundred sixty-one thousand, four hundred forty-nine".