16687145 has 16 divisors (see below), whose sum is σ = 20812800. Its totient is φ = 12830400.

The previous prime is 16687129. The next prime is 16687159. The reversal of 16687145 is 54178661.

16687145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16687145 - 2⁴ = 16687129 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 16687099 and 16687108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30575 + ... + 31115.

It is an arithmetic number, because the mean of its divisors is an integer number (1300800).

Almost surely, 2^16687145 is an apocalyptic number.

It is an amenable number.

16687145 is a deficient number, since it is larger than the sum of its proper divisors (4125655).

16687145 is a wasteful number, since it uses less digits than its factorization.

16687145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its digits is 40320, while the sum is 38.

The square root of 16687145 is about 4084.9902080666. The cubic root of 16687145 is about 255.5410529122.

The spelling of 16687145 in words is "sixteen million, six hundred eighty-seven thousand, one hundred forty-five".