11571387 has 8 divisors (see below), whose sum is σ = 15444240. Its totient is φ = 7706400.

The previous prime is 11571383. The next prime is 11571419. The reversal of 11571387 is 78317511.

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

It is not a de Polignac number, because 11571387 - 2² = 11571383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11571383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4689 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (1930530).

Almost surely, 2^11571387 is an apocalyptic number.

11571387 is a deficient number, since it is larger than the sum of its proper divisors (3872853).

11571387 is a wasteful number, since it uses less digits than its factorization.

11571387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933.

The product of its digits is 5880, while the sum is 33.

The square root of 11571387 is about 3401.6741466519. The cubic root of 11571387 is about 226.1839614758.

Adding to 11571387 its reverse (78317511), we get a palindrome (89888898).

The spelling of 11571387 in words is "eleven million, five hundred seventy-one thousand, three hundred eighty-seven".