11561172 has 24 divisors (see below), whose sum is σ = 30830016. Its totient is φ = 3303168.

The previous prime is 11561161. The next prime is 11561197. The reversal of 11561172 is 27116511.

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, 68733 + ... + 68900.

It is an arithmetic number, because the mean of its divisors is an integer number (1284584).

Almost surely, 2^11561172 is an apocalyptic number.

11561172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11561172 is an abundant number, since it is smaller than the sum of its proper divisors (19268844).

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

11561172 is a wasteful number, since it uses less digits than its factorization.

11561172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137647 (or 137645 counting only the distinct ones).

The product of its digits is 420, while the sum is 24.

The square root of 11561172 is about 3400.1723485729. The cubic root of 11561172 is about 226.1173849171.

Adding to 11561172 its reverse (27116511), we get a palindrome (38677683).

The spelling of 11561172 in words is "eleven million, five hundred sixty-one thousand, one hundred seventy-two".