11561145 has 16 divisors (see below), whose sum is σ = 18576000. Its totient is φ = 6139904.

The previous prime is 11561117. The next prime is 11561159. The reversal of 11561145 is 54116511.

It is a cyclic number.

It is not a de Polignac number, because 11561145 - 2¹³ = 11552953 is a prime.

It is a super-2 number, since 2×11561145² = 267320147422050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2356 + ... + 5354.

It is an arithmetic number, because the mean of its divisors is an integer number (1161000).

Almost surely, 2^11561145 is an apocalyptic number.

11561145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11561145 is a deficient number, since it is larger than the sum of its proper divisors (7014855).

11561145 is a wasteful number, since it uses less digits than its factorization.

11561145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264.

The product of its digits is 600, while the sum is 24.

The square root of 11561145 is about 3400.1683781836. The cubic root of 11561145 is about 226.1172088918.

Adding to 11561145 its reverse (54116511), we get a palindrome (65677656).

The spelling of 11561145 in words is "eleven million, five hundred sixty-one thousand, one hundred forty-five".