11652381 has 36 divisors (see below), whose sum is σ = 18727488. Its totient is φ = 6975072.

The previous prime is 11652379. The next prime is 11652391. The reversal of 11652381 is 18325611.

11652381 is a `hidden beast` number, since 1 + 1 + 652 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 11652381 - 2¹ = 11652379 is a prime.

It is a super-2 number, since 2×11652381² = 271555965938322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11652341) 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 35 ways as a sum of consecutive naturals, for example, 71406 + ... + 71568.

It is an arithmetic number, because the mean of its divisors is an integer number (520208).

Almost surely, 2^11652381 is an apocalyptic number.

It is an amenable number.

11652381 is a deficient number, since it is larger than the sum of its proper divisors (7075107).

11652381 is a wasteful number, since it uses less digits than its factorization.

11652381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 226 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11652381 is about 3413.5584072929. The cubic root of 11652381 is about 226.7104603483.

Adding to 11652381 its reverse (18325611), we get a palindrome (29977992).

The spelling of 11652381 in words is "eleven million, six hundred fifty-two thousand, three hundred eighty-one".