11561860 has 12 divisors (see below), whose sum is σ = 24279948. Its totient is φ = 4624736.

The previous prime is 11561843. The next prime is 11561863. The reversal of 11561860 is 6816511.

It can be written as a sum of positive squares in 2 ways, for example, as 6390784 + 5171076 = 2528^2 + 2274^2 .

It is not an unprimeable number, because it can be changed into a prime (11561863) 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, 289027 + ... + 289066.

It is an arithmetic number, because the mean of its divisors is an integer number (2023329).

Almost surely, 2^11561860 is an apocalyptic number.

11561860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11561860 is an abundant number, since it is smaller than the sum of its proper divisors (12718088).

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

11561860 is a wasteful number, since it uses less digits than its factorization.

11561860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578102 (or 578100 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 11561860 is about 3400.2735184100. The cubic root of 11561860 is about 226.1218702084.

It can be divided in two parts, 11561 and 860, that added together give a palindrome (12421).

The spelling of 11561860 in words is "eleven million, five hundred sixty-one thousand, eight hundred sixty".