11661145 has 8 divisors (see below), whose sum is σ = 14129856. Its totient is φ = 9237936.

The previous prime is 11661121. The next prime is 11661151. The reversal of 11661145 is 54116611.

11661145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11661145 - 2⁹ = 11660633 is a prime.

It is a super-2 number, since 2×11661145² = 271964605422050, which contains 22 as substring.

It is a Duffinian 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, 10807 + ... + 11836.

It is an arithmetic number, because the mean of its divisors is an integer number (1766232).

Almost surely, 2^11661145 is an apocalyptic number.

It is an amenable number.

11661145 is a deficient number, since it is larger than the sum of its proper divisors (2468711).

11661145 is a wasteful number, since it uses less digits than its factorization.

11661145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22751.

The product of its digits is 720, while the sum is 25.

The square root of 11661145 is about 3414.8418704239. The cubic root of 11661145 is about 226.7672840010.

Adding to 11661145 its reverse (54116611), we get a palindrome (65777756).

The spelling of 11661145 in words is "eleven million, six hundred sixty-one thousand, one hundred forty-five".