11744561 has 4 divisors (see below), whose sum is σ = 11751972. Its totient is φ = 11737152.

The previous prime is 11744539. The next prime is 11744581. The reversal of 11744561 is 16544711.

11744561 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16544711 = 2819 ⋅5869.

It can be written as a sum of positive squares in 2 ways, for example, as 2016400 + 9728161 = 1420^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 11744561 - 2¹⁴ = 11728177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11744521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 4853.

It is an arithmetic number, because the mean of its divisors is an integer number (2937993).

Almost surely, 2^11744561 is an apocalyptic number.

It is an amenable number.

11744561 is a deficient number, since it is larger than the sum of its proper divisors (7411).

11744561 is an equidigital number, since it uses as much as digits as its factorization.

11744561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410.

The product of its digits is 3360, while the sum is 29.

The square root of 11744561 is about 3427.0338486802. The cubic root of 11744561 is about 227.3067134193.

The spelling of 11744561 in words is "eleven million, seven hundred forty-four thousand, five hundred sixty-one".