16320042 has 20 divisors (see below), whose sum is σ = 36569346. Its totient is φ = 5439960.

The previous prime is 16320037. The next prime is 16320047. The reversal of 16320042 is 24002361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16320037) and next prime (16320047).

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 2099601 = 3771^2 + 1449^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16319997 and 16320024.

It is not an unprimeable number, because it can be changed into a prime (16320047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 50209 + ... + 50532.

Almost surely, 2^16320042 is an apocalyptic number.

16320042 is an abundant number, since it is smaller than the sum of its proper divisors (20249304).

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

16320042 is a wasteful number, since it uses less digits than its factorization.

16320042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100755 (or 100746 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 16320042 is about 4039.8071736161. The cubic root of 16320042 is about 253.6532458097.

The spelling of 16320042 in words is "sixteen million, three hundred twenty thousand, forty-two".