11378161 has 4 divisors (see below), whose sum is σ = 11422692. Its totient is φ = 11333632.

The previous prime is 11378137. The next prime is 11378177. The reversal of 11378161 is 16187311.

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 6471936 + 4906225 = 2544^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 11378161 - 2⁹ = 11377649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11378461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21880 + ... + 22393.

It is an arithmetic number, because the mean of its divisors is an integer number (2855673).

Almost surely, 2^11378161 is an apocalyptic number.

It is an amenable number.

11378161 is a deficient number, since it is larger than the sum of its proper divisors (44531).

11378161 is an equidigital number, since it uses as much as digits as its factorization.

11378161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44530.

The product of its digits is 1008, while the sum is 28.

The square root of 11378161 is about 3373.1529760745. The cubic root of 11378161 is about 224.9179025584.

The spelling of 11378161 in words is "eleven million, three hundred seventy-eight thousand, one hundred sixty-one".