11159641 has 4 divisors (see below), whose sum is σ = 11168784. Its totient is φ = 11150500.

The previous prime is 11159611. The next prime is 11159647. The reversal of 11159641 is 14695111.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14695111 = 3559 ⋅4129.

It is a cyclic number.

It is not a de Polignac number, because 11159641 - 2⁷ = 11159513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11159647) 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, 2395 + ... + 5296.

It is an arithmetic number, because the mean of its divisors is an integer number (2792196).

Almost surely, 2^11159641 is an apocalyptic number.

It is an amenable number.

11159641 is a deficient number, since it is larger than the sum of its proper divisors (9143).

11159641 is an equidigital number, since it uses as much as digits as its factorization.

11159641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142.

The product of its digits is 1080, while the sum is 28.

The square root of 11159641 is about 3340.6048853464. The cubic root of 11159641 is about 223.4687199208.

The spelling of 11159641 in words is "eleven million, one hundred fifty-nine thousand, six hundred forty-one".