11862587 has 4 divisors (see below), whose sum is σ = 12941016. Its totient is φ = 10784160.

The previous prime is 11862581. The next prime is 11862611. The reversal of 11862587 is 78526811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78526811 = 11 ⋅7138801.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11862587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11862587.

It is not an unprimeable number, because it can be changed into a prime (11862581) 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 3 ways as a sum of consecutive naturals, for example, 539198 + ... + 539219.

It is an arithmetic number, because the mean of its divisors is an integer number (3235254).

Almost surely, 2^11862587 is an apocalyptic number.

11862587 is a deficient number, since it is larger than the sum of its proper divisors (1078429).

11862587 is a wasteful number, since it uses less digits than its factorization.

11862587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078428.

The product of its digits is 26880, while the sum is 38.

The square root of 11862587 is about 3444.2106497716. The cubic root of 11862587 is about 228.0656102858.

It can be divided in two parts, 1186 and 2587, that added together give a palindrome (3773).

The spelling of 11862587 in words is "eleven million, eight hundred sixty-two thousand, five hundred eighty-seven".