11774561 has 4 divisors (see below), whose sum is σ = 12048432. Its totient is φ = 11500692.

The previous prime is 11774549. The next prime is 11774573. The reversal of 11774561 is 16547711.

11774561 is digitally balanced in base 2, because in such base 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16547711 = 337 ⋅49103.

It is an interprime number because it is at equal distance from previous prime (11774549) and next prime (11774573).

It is a cyclic number.

It is not a de Polignac number, because 11774561 - 2²² = 7580257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11774501) 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, 136871 + ... + 136956.

It is an arithmetic number, because the mean of its divisors is an integer number (3012108).

Almost surely, 2^11774561 is an apocalyptic number.

It is an amenable number.

11774561 is a deficient number, since it is larger than the sum of its proper divisors (273871).

11774561 is an equidigital number, since it uses as much as digits as its factorization.

11774561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273870.

The product of its digits is 5880, while the sum is 32.

The square root of 11774561 is about 3431.4080200408. The cubic root of 11774561 is about 227.5000909713.

The spelling of 11774561 in words is "eleven million, seven hundred seventy-four thousand, five hundred sixty-one".