13687542 has 40 divisors (see below), whose sum is σ = 33462792. Its totient is φ = 4147200.

The previous prime is 13687529. The next prime is 13687549. The reversal of 13687542 is 24578631.

13687542 is a `hidden beast` number, since 1 + 36 + 87 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 13687497 and 13687506.

It is a congruent 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 19 ways as a sum of consecutive naturals, for example, 2059 + ... + 5622.

Almost surely, 2^13687542 is an apocalyptic number.

13687542 is an abundant number, since it is smaller than the sum of its proper divisors (19775250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13687542 is a wasteful number, since it uses less digits than its factorization.

13687542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7706 (or 7697 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 13687542 is about 3699.6678229268. The cubic root of 13687542 is about 239.2076997965.

It can be divided in two parts, 136 and 87542, that added together give a palindrome (87678).

The spelling of 13687542 in words is "thirteen million, six hundred eighty-seven thousand, five hundred forty-two".