12091587 has 4 divisors (see below), whose sum is σ = 16122120. Its totient is φ = 8061056.

The previous prime is 12091577. The next prime is 12091589. The reversal of 12091587 is 78519021.

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

It is a cyclic number.

It is not a de Polignac number, because 12091587 - 2⁴ = 12091571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12091589) 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, 2015262 + ... + 2015267.

It is an arithmetic number, because the mean of its divisors is an integer number (4030530).

Almost surely, 2^12091587 is an apocalyptic number.

12091587 is a deficient number, since it is larger than the sum of its proper divisors (4030533).

12091587 is an equidigital number, since it uses as much as digits as its factorization.

12091587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030532.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 12091587 is about 3477.2959321864. The cubic root of 12091587 is about 229.5238226466.

The spelling of 12091587 in words is "twelve million, ninety-one thousand, five hundred eighty-seven".