16172641 has 4 divisors (see below), whose sum is σ = 16180884. Its totient is φ = 16164400.

The previous prime is 16172623. The next prime is 16172647. The reversal of 16172641 is 14627161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13660416 + 2512225 = 3696^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 16172641 - 2¹¹ = 16170593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16172647) 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, 711 + ... + 5731.

It is an arithmetic number, because the mean of its divisors is an integer number (4045221).

Almost surely, 2^16172641 is an apocalyptic number.

It is an amenable number.

16172641 is a deficient number, since it is larger than the sum of its proper divisors (8243).

16172641 is an equidigital number, since it uses as much as digits as its factorization.

16172641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242.

The product of its digits is 2016, while the sum is 28.

The square root of 16172641 is about 4021.5222242330. The cubic root of 16172641 is about 252.8872781297.

The spelling of 16172641 in words is "sixteen million, one hundred seventy-two thousand, six hundred forty-one".