11581385 has 8 divisors (see below), whose sum is σ = 13917120. Its totient is φ = 9252144.

The previous prime is 11581379. The next prime is 11581417. The reversal of 11581385 is 58318511.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11581385 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 4226 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (1739640).

Almost surely, 2^11581385 is an apocalyptic number.

It is an amenable number.

11581385 is a deficient number, since it is larger than the sum of its proper divisors (2335735).

11581385 is a wasteful number, since it uses less digits than its factorization.

11581385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247.

The product of its digits is 4800, while the sum is 32.

The square root of 11581385 is about 3403.1433998584. The cubic root of 11581385 is about 226.2490857995.

Adding to 11581385 its reverse (58318511), we get a palindrome (69899896).

The spelling of 11581385 in words is "eleven million, five hundred eighty-one thousand, three hundred eighty-five".