16541987 has 8 divisors (see below), whose sum is σ = 20623872. Its totient is φ = 12889800.

The previous prime is 16541981. The next prime is 16542017. The reversal of 16541987 is 78914561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16541987 - 2¹⁴ = 16525603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16541981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107339 + ... + 107492.

It is an arithmetic number, because the mean of its divisors is an integer number (2577984).

Almost surely, 2^16541987 is an apocalyptic number.

16541987 is a deficient number, since it is larger than the sum of its proper divisors (4081885).

16541987 is a wasteful number, since it uses less digits than its factorization.

16541987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214849.

The product of its digits is 60480, while the sum is 41.

The square root of 16541987 is about 4067.1841610628. The cubic root of 16541987 is about 254.7979278272.

The spelling of 16541987 in words is "sixteen million, five hundred forty-one thousand, nine hundred eighty-seven".