11861172 has 36 divisors (see below), whose sum is σ = 31747716. Its totient is φ = 3720960.

The previous prime is 11861167. The next prime is 11861191. The reversal of 11861172 is 27116811.

It can be written as a sum of positive squares in 2 ways, for example, as 9217296 + 2643876 = 3036^2 + 1626^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9079 + ... + 10302.

It is an arithmetic number, because the mean of its divisors is an integer number (881881).

Almost surely, 2^11861172 is an apocalyptic number.

11861172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11861172 is an abundant number, since it is smaller than the sum of its proper divisors (19886544).

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

11861172 is a wasteful number, since it uses less digits than its factorization.

11861172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19408 (or 19403 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 11861172 is about 3444.0052264769. The cubic root of 11861172 is about 228.0565418403.

Adding to 11861172 its reverse (27116811), we get a palindrome (38977983).

The spelling of 11861172 in words is "eleven million, eight hundred sixty-one thousand, one hundred seventy-two".