11585381 has 4 divisors (see below), whose sum is σ = 12266892. Its totient is φ = 10903872.

The previous prime is 11585369. The next prime is 11585393. The reversal of 11585381 is 18358511.

It is a happy number.

11585381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11585369) and next prime (11585393).

It can be written as a sum of positive squares in 2 ways, for example, as 7317025 + 4268356 = 2705^2 + 2066^2 .

It is a cyclic number.

It is not a de Polignac number, because 11585381 - 2⁶ = 11585317 is a prime.

It is a super-2 number, since 2×11585381² = 268442105830322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11585341) 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, 340730 + ... + 340763.

It is an arithmetic number, because the mean of its divisors is an integer number (3066723).

Almost surely, 2^11585381 is an apocalyptic number.

It is an amenable number.

11585381 is a deficient number, since it is larger than the sum of its proper divisors (681511).

11585381 is an equidigital number, since it uses as much as digits as its factorization.

11585381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681510.

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

The square root of 11585381 is about 3403.7304534878. The cubic root of 11585381 is about 226.2751042014.

The spelling of 11585381 in words is "eleven million, five hundred eighty-five thousand, three hundred eighty-one".