13687545 has 16 divisors (see below), whose sum is σ = 22410432. Its totient is φ = 7129920.

The previous prime is 13687529. The next prime is 13687549. The reversal of 13687545 is 54578631.

13687545 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13687545 - 2⁴ = 13687529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13687549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9966 + ... + 11255.

It is an arithmetic number, because the mean of its divisors is an integer number (1400652).

Almost surely, 2^13687545 is an apocalyptic number.

13687545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13687545 is a deficient number, since it is larger than the sum of its proper divisors (8722887).

13687545 is a wasteful number, since it uses less digits than its factorization.

13687545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21272.

The product of its digits is 100800, while the sum is 39.

The square root of 13687545 is about 3699.6682283686. The cubic root of 13687545 is about 239.2077172728.

The spelling of 13687545 in words is "thirteen million, six hundred eighty-seven thousand, five hundred forty-five".