16004287 has 4 divisors (see below), whose sum is σ = 17235400. Its totient is φ = 14773176.

The previous prime is 16004279. The next prime is 16004291. The reversal of 16004287 is 78240061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78240061 = 5821 ⋅13441.

It is a cyclic number.

It is not a de Polignac number, because 16004287 - 2³ = 16004279 is a prime.

It is a super-2 number, since 2×16004287² = 512274404756738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16004207) 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, 615537 + ... + 615562.

It is an arithmetic number, because the mean of its divisors is an integer number (4308850).

Almost surely, 2^16004287 is an apocalyptic number.

16004287 is a deficient number, since it is larger than the sum of its proper divisors (1231113).

16004287 is a wasteful number, since it uses less digits than its factorization.

16004287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231112.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 16004287 is about 4000.5358391096. The cubic root of 16004287 is about 252.0067133090.

The spelling of 16004287 in words is "sixteen million, four thousand, two hundred eighty-seven".