11894561 has 4 divisors (see below), whose sum is σ = 13593792. Its totient is φ = 10195332.

The previous prime is 11894539. The next prime is 11894563. The reversal of 11894561 is 16549811.

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: 16549811 = 23 ⋅719557.

It is not a de Polignac number, because 11894561 - 2⁶ = 11894497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11894563) 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, 849605 + ... + 849618.

It is an arithmetic number, because the mean of its divisors is an integer number (3398448).

Almost surely, 2^11894561 is an apocalyptic number.

It is an amenable number.

11894561 is a deficient number, since it is larger than the sum of its proper divisors (1699231).

11894561 is an equidigital number, since it uses as much as digits as its factorization.

11894561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699230.

The product of its digits is 8640, while the sum is 35.

The square root of 11894561 is about 3448.8492283659. The cubic root of 11894561 is about 228.2703331379.

The spelling of 11894561 in words is "eleven million, eight hundred ninety-four thousand, five hundred sixty-one".