13641587 has 4 divisors (see below), whose sum is σ = 13661280. Its totient is φ = 13621896.

The previous prime is 13641557. The next prime is 13641623. The reversal of 13641587 is 78514631.

13641587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13641587 - 2¹⁰ = 13640563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13641517) 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, 8768 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (3415320).

Almost surely, 2^13641587 is an apocalyptic number.

13641587 is a deficient number, since it is larger than the sum of its proper divisors (19693).

13641587 is an equidigital number, since it uses as much as digits as its factorization.

13641587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19692.

The product of its digits is 20160, while the sum is 35.

The square root of 13641587 is about 3693.4519084455. The cubic root of 13641587 is about 238.9396917212.

The spelling of 13641587 in words is "thirteen million, six hundred forty-one thousand, five hundred eighty-seven".