11561472 has 120 divisors (see below), whose sum is σ = 36120084. Its totient is φ = 3538944.

The previous prime is 11561471. The next prime is 11561477. The reversal of 11561472 is 27416511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10342656 + 1218816 = 3216^2 + 1104^2 .

It is not an unprimeable number, because it can be changed into a prime (11561471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59808 + ... + 60000.

Almost surely, 2^11561472 is an apocalyptic number.

11561472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11561472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18060042).

11561472 is an abundant number, since it is smaller than the sum of its proper divisors (24558612).

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

11561472 is a wasteful number, since it uses less digits than its factorization.

11561472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 211 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 11561472 is about 3400.2164636976. The cubic root of 11561472 is about 226.1193407346.

Adding to 11561472 its reverse (27416511), we get a palindrome (38977983).

It can be divided in two parts, 1156 and 1472, that added together give a triangular number (2628 = T₇₂).

The spelling of 11561472 in words is "eleven million, five hundred sixty-one thousand, four hundred seventy-two".