11561286 has 32 divisors (see below), whose sum is σ = 25660800. Its totient is φ = 3442880.

The previous prime is 11561267. The next prime is 11561287. The reversal of 11561286 is 68216511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2410 + ... + 5378.

It is an arithmetic number, because the mean of its divisors is an integer number (801900).

Almost surely, 2^11561286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11561286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12830400).

11561286 is an abundant number, since it is smaller than the sum of its proper divisors (14099514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11561286 is a wasteful number, since it uses less digits than its factorization.

11561286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044.

The product of its digits is 2880, while the sum is 30.

The square root of 11561286 is about 3400.1891123877. The cubic root of 11561286 is about 226.1181281317.

Adding to 11561286 its reverse (68216511), we get a palindrome (79777797).

It can be divided in two parts, 1156 and 1286, that added together give a palindrome (2442).

The spelling of 11561286 in words is "eleven million, five hundred sixty-one thousand, two hundred eighty-six".