16142321 has 8 divisors (see below), whose sum is σ = 17435880. Its totient is φ = 14856192.

The previous prime is 16142311. The next prime is 16142339. The reversal of 16142321 is 12324161.

It can be written as a sum of positive squares in 4 ways, for example, as 429025 + 15713296 = 655^2 + 3964^2 .

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

It is not a de Polignac number, because 16142321 - 2⁶ = 16142257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16142293 and 16142302.

It is not an unprimeable number, because it can be changed into a prime (16142311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (2179485).

Almost surely, 2^16142321 is an apocalyptic number.

It is an amenable number.

16142321 is a deficient number, since it is larger than the sum of its proper divisors (1293559).

16142321 is a wasteful number, since it uses less digits than its factorization.

16142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715.

The product of its digits is 288, while the sum is 20.

The square root of 16142321 is about 4017.7507389085. The cubic root of 16142321 is about 252.7291440130.

Adding to 16142321 its reverse (12324161), we get a palindrome (28466482).

The spelling of 16142321 in words is "sixteen million, one hundred forty-two thousand, three hundred twenty-one".