11561135 has 8 divisors (see below), whose sum is σ = 13912800. Its totient is φ = 9222624.

The previous prime is 11561117. The next prime is 11561159. The reversal of 11561135 is 53116511.

11561135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11561135 - 2¹⁶ = 11495599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11561135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1235 + ... + 4964.

It is an arithmetic number, because the mean of its divisors is an integer number (1739100).

Almost surely, 2^11561135 is an apocalyptic number.

11561135 is a deficient number, since it is larger than the sum of its proper divisors (2351665).

11561135 is an equidigital number, since it uses as much as digits as its factorization.

11561135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6577.

The product of its digits is 450, while the sum is 23.

The square root of 11561135 is about 3400.1669076679. The cubic root of 11561135 is about 226.1171436972.

Adding to 11561135 its reverse (53116511), we get a palindrome (64677646).

The spelling of 11561135 in words is "eleven million, five hundred sixty-one thousand, one hundred thirty-five".