11311587 has 12 divisors (see below), whose sum is σ = 18673200. Its totient is φ = 6463728.

The previous prime is 11311583. The next prime is 11311589. The reversal of 11311587 is 78511311.

It is not a de Polignac number, because 11311587 - 2² = 11311583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11311587.

It is not an unprimeable number, because it can be changed into a prime (11311583) 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 11 ways as a sum of consecutive naturals, for example, 89712 + ... + 89837.

It is an arithmetic number, because the mean of its divisors is an integer number (1556100).

Almost surely, 2^11311587 is an apocalyptic number.

11311587 is a deficient number, since it is larger than the sum of its proper divisors (7361613).

11311587 is a wasteful number, since it uses less digits than its factorization.

11311587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179562 (or 179559 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 11311587 is about 3363.2702835187. The cubic root of 11311587 is about 224.4783768275.

Adding to 11311587 its reverse (78511311), we get a palindrome (89822898).

The spelling of 11311587 in words is "eleven million, three hundred eleven thousand, five hundred eighty-seven".