16424 has 8 divisors (see below), whose sum is σ = 30810. Its totient is φ = 8208.

The previous prime is 16421. The next prime is 16427. The reversal of 16424 is 42461.

It is an interprime number because it is at equal distance from previous prime (16421) and next prime (16427).

It can be written as a sum of positive squares in only one way, i.e., 13924 + 2500 = 118^2 + 50^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 9 and base 15.

It is not an unprimeable number, because it can be changed into a prime (16421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1019 + ... + 1034.

2¹⁶⁴²⁴ is an apocalyptic number.

It is an amenable number.

16424 is a deficient number, since it is larger than the sum of its proper divisors (14386).

16424 is a wasteful number, since it uses less digits than its factorization.

16424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2055 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 16424 is about 128.1561547488. The cubic root of 16424 is about 25.4190693181.

Adding to 16424 its reverse (42461), we get a palindrome (58885).

The spelling of 16424 in words is "sixteen thousand, four hundred twenty-four".