11861145 has 48 divisors (see below), whose sum is σ = 21762000. Its totient is φ = 5967360.

The previous prime is 11861141. The next prime is 11861159. The reversal of 11861145 is 54116811.

11861145 is a `hidden beast` number, since 1 + 1 + 8 + 611 + 45 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3549456 + 8311689 = 1884^2 + 2883^2 .

It is not a de Polignac number, because 11861145 - 2² = 11861141 is a prime.

It is a super-2 number, since 2×11861145² = 281373521422050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11861141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79531 + ... + 79679.

It is an arithmetic number, because the mean of its divisors is an integer number (453375).

Almost surely, 2^11861145 is an apocalyptic number.

11861145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11861145 is a deficient number, since it is larger than the sum of its proper divisors (9900855).

11861145 is a wasteful number, since it uses less digits than its factorization.

11861145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 247 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 11861145 is about 3444.0013066200. The cubic root of 11861145 is about 228.0563687959.

Adding to 11861145 its reverse (54116811), we get a palindrome (65977956).

The spelling of 11861145 in words is "eleven million, eight hundred sixty-one thousand, one hundred forty-five".