11644145 has 4 divisors (see below), whose sum is σ = 13972980. Its totient is φ = 9315312.

The previous prime is 11644117. The next prime is 11644211. The reversal of 11644145 is 54144611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 7612081 = 2008^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 11644145 - 2²⁰ = 10595569 is a prime.

It is a super-2 number, since 2×11644145² = 271172225562050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164410 + ... + 1164419.

It is an arithmetic number, because the mean of its divisors is an integer number (3493245).

Almost surely, 2^11644145 is an apocalyptic number.

It is an amenable number.

11644145 is a deficient number, since it is larger than the sum of its proper divisors (2328835).

11644145 is an equidigital number, since it uses as much as digits as its factorization.

11644145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328834.

The product of its digits is 1920, while the sum is 26.

The square root of 11644145 is about 3412.3518282850. The cubic root of 11644145 is about 226.6570341447.

Adding to 11644145 its reverse (54144611), we get a palindrome (65788756).

The spelling of 11644145 in words is "eleven million, six hundred forty-four thousand, one hundred forty-five".