11561061 has 4 divisors (see below), whose sum is σ = 15414752. Its totient is φ = 7707372.

The previous prime is 11561027. The next prime is 11561087. The reversal of 11561061 is 16016511.

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.

It is not a de Polignac number, because 11561061 - 2⁷ = 11560933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561021) 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, 1926841 + ... + 1926846.

It is an arithmetic number, because the mean of its divisors is an integer number (3853688).

Almost surely, 2^11561061 is an apocalyptic number.

It is an amenable number.

11561061 is a deficient number, since it is larger than the sum of its proper divisors (3853691).

11561061 is an equidigital number, since it uses as much as digits as its factorization.

11561061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853690.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 11561061 is about 3400.1560258318. The cubic root of 11561061 is about 226.1166612560.

Adding to 11561061 its reverse (16016511), we get a palindrome (27577572).

The spelling of 11561061 in words is "eleven million, five hundred sixty-one thousand, sixty-one".