16272161 has 4 divisors (see below), whose sum is σ = 16833300. Its totient is φ = 15711024.

The previous prime is 16272149. The next prime is 16272163. The reversal of 16272161 is 16127261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12737761 + 3534400 = 3569^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 16272161 - 2¹⁸ = 16010017 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 16272161.

It is not an unprimeable number, because it can be changed into a prime (16272163) 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, 280526 + ... + 280583.

It is an arithmetic number, because the mean of its divisors is an integer number (4208325).

Almost surely, 2^16272161 is an apocalyptic number.

It is an amenable number.

16272161 is a deficient number, since it is larger than the sum of its proper divisors (561139).

16272161 is an equidigital number, since it uses as much as digits as its factorization.

16272161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561138.

The product of its digits is 1008, while the sum is 26.

The square root of 16272161 is about 4033.8766713919. The cubic root of 16272161 is about 253.4049403225.

The spelling of 16272161 in words is "sixteen million, two hundred seventy-two thousand, one hundred sixty-one".