11329561 has 4 divisors (see below), whose sum is σ = 11336400. Its totient is φ = 11322724.

The previous prime is 11329559. The next prime is 11329573. The reversal of 11329561 is 16592311.

11329561 is digitally balanced in base 3, 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11329561 - 2¹ = 11329559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11329061) 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, 810 + ... + 4828.

It is an arithmetic number, because the mean of its divisors is an integer number (2834100).

Almost surely, 2^11329561 is an apocalyptic number.

It is an amenable number.

11329561 is a deficient number, since it is larger than the sum of its proper divisors (6839).

11329561 is an equidigital number, since it uses as much as digits as its factorization.

11329561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6838.

The product of its digits is 1620, while the sum is 28.

The square root of 11329561 is about 3365.9413245034. The cubic root of 11329561 is about 224.5972118816.

The spelling of 11329561 in words is "eleven million, three hundred twenty-nine thousand, five hundred sixty-one".