13525987 has 4 divisors (see below), whose sum is σ = 13645800. Its totient is φ = 13406176.

The previous prime is 13525969. The next prime is 13525991. The reversal of 13525987 is 78952531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78952531 = 7 ⋅11278933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13525987 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (13525907) 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, 59737 + ... + 59962.

It is an arithmetic number, because the mean of its divisors is an integer number (3411450).

Almost surely, 2^13525987 is an apocalyptic number.

13525987 is a deficient number, since it is larger than the sum of its proper divisors (119813).

13525987 is a wasteful number, since it uses less digits than its factorization.

13525987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119812.

The product of its digits is 75600, while the sum is 40.

The square root of 13525987 is about 3677.7692967341. The cubic root of 13525987 is about 238.2628442768.

The spelling of 13525987 in words is "thirteen million, five hundred twenty-five thousand, nine hundred eighty-seven".