16276321 has 4 divisors (see below), whose sum is σ = 16373952. Its totient is φ = 16178692.

The previous prime is 16276319. The next prime is 16276343. The reversal of 16276321 is 12367261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16276321 - 2¹ = 16276319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16276321.

It is not an unprimeable number, because it can be changed into a prime (16276391) 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 3 ways as a sum of consecutive naturals, for example, 48565 + ... + 48898.

It is an arithmetic number, because the mean of its divisors is an integer number (4093488).

Almost surely, 2^16276321 is an apocalyptic number.

It is an amenable number.

16276321 is a deficient number, since it is larger than the sum of its proper divisors (97631).

16276321 is an equidigital number, since it uses as much as digits as its factorization.

16276321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97630.

The product of its digits is 3024, while the sum is 28.

The square root of 16276321 is about 4034.3922714580. The cubic root of 16276321 is about 253.4265329213.

The spelling of 16276321 in words is "sixteen million, two hundred seventy-six thousand, three hundred twenty-one".