14991587 has 4 divisors (see below), whose sum is σ = 16144800. Its totient is φ = 13838376.

The previous prime is 14991553. The next prime is 14991601. The reversal of 14991587 is 78519941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78519941 = 7529 ⋅10429.

It is a cyclic number.

It is not a de Polignac number, because 14991587 - 2⁶ = 14991523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14991287) 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, 576587 + ... + 576612.

It is an arithmetic number, because the mean of its divisors is an integer number (4036200).

Almost surely, 2^14991587 is an apocalyptic number.

14991587 is a deficient number, since it is larger than the sum of its proper divisors (1153213).

14991587 is a wasteful number, since it uses less digits than its factorization.

14991587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153212.

The product of its digits is 90720, while the sum is 44.

The square root of 14991587 is about 3871.8970802437. The cubic root of 14991587 is about 246.5750916055.

The spelling of 14991587 in words is "fourteen million, nine hundred ninety-one thousand, five hundred eighty-seven".