16272521 has 4 divisors (see below), whose sum is σ = 16315392. Its totient is φ = 16229652.

The previous prime is 16272517. The next prime is 16272527. The reversal of 16272521 is 12527261.

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 16272521 - 2² = 16272517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16272527) 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 3 ways as a sum of consecutive naturals, for example, 20861 + ... + 21626.

It is an arithmetic number, because the mean of its divisors is an integer number (4078848).

Almost surely, 2^16272521 is an apocalyptic number.

It is an amenable number.

16272521 is a deficient number, since it is larger than the sum of its proper divisors (42871).

16272521 is an equidigital number, since it uses as much as digits as its factorization.

16272521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42870.

The product of its digits is 1680, while the sum is 26.

The square root of 16272521 is about 4033.9212932332. The cubic root of 16272521 is about 253.4068090582.

Adding to 16272521 its reverse (12527261), we get a palindrome (28799782).

The spelling of 16272521 in words is "sixteen million, two hundred seventy-two thousand, five hundred twenty-one".