16612321 has 8 divisors (see below), whose sum is σ = 18216000. Its totient is φ = 15024240.

The previous prime is 16612261. The next prime is 16612333. The reversal of 16612321 is 12321661.

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

It is not a de Polignac number, because 16612321 - 2¹¹ = 16610273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16612292 and 16612301.

It is not an unprimeable number, because it can be changed into a prime (16612381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1606 + ... + 5983.

It is an arithmetic number, because the mean of its divisors is an integer number (2277000).

Almost surely, 2^16612321 is an apocalyptic number.

16612321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16612321 is a deficient number, since it is larger than the sum of its proper divisors (1603679).

16612321 is a wasteful number, since it uses less digits than its factorization.

16612321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7799.

The product of its digits is 432, while the sum is 22.

The square root of 16612321 is about 4075.8215122844. The cubic root of 16612321 is about 255.1585378358.

Adding to 16612321 its reverse (12321661), we get a palindrome (28933982).

The spelling of 16612321 in words is "sixteen million, six hundred twelve thousand, three hundred twenty-one".