11199145 has 8 divisors (see below), whose sum is σ = 13498056. Its totient is φ = 8919936.

The previous prime is 11199143. The next prime is 11199157. The reversal of 11199145 is 54199111.

11199145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2812329 + 8386816 = 1677^2 + 2896^2 .

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 11199145 - 2¹ = 11199143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11199143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642 + ... + 5971.

It is an arithmetic number, because the mean of its divisors is an integer number (1687257).

Almost surely, 2^11199145 is an apocalyptic number.

It is an amenable number.

11199145 is a deficient number, since it is larger than the sum of its proper divisors (2298911).

11199145 is an equidigital number, since it uses as much as digits as its factorization.

11199145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851.

The product of its digits is 1620, while the sum is 31.

The square root of 11199145 is about 3346.5123636407. The cubic root of 11199145 is about 223.7320949437.

The spelling of 11199145 in words is "eleven million, one hundred ninety-nine thousand, one hundred forty-five".