11380505 has 4 divisors (see below), whose sum is σ = 13656612. Its totient is φ = 9104400.

The previous prime is 11380489. The next prime is 11380507. The reversal of 11380505 is 50508311.

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 3297856 + 8082649 = 1816^2 + 2843^2 .

It is not a de Polignac number, because 11380505 - 2⁴ = 11380489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11380507) by changing a digit.

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, 1138046 + ... + 1138055.

It is an arithmetic number, because the mean of its divisors is an integer number (3414153).

Almost surely, 2^11380505 is an apocalyptic number.

It is an amenable number.

11380505 is a deficient number, since it is larger than the sum of its proper divisors (2276107).

11380505 is an equidigital number, since it uses as much as digits as its factorization.

11380505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276106.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 11380505 is about 3373.5004075885. The cubic root of 11380505 is about 224.9333465118.

Adding to 11380505 its reverse (50508311), we get a palindrome (61888816).

The spelling of 11380505 in words is "eleven million, three hundred eighty thousand, five hundred five".