16172705 has 8 divisors (see below), whose sum is σ = 20428800. Its totient is φ = 12257136.

The previous prime is 16172699. The next prime is 16172707. The reversal of 16172705 is 50727161.

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

It is a cyclic number.

It is not a de Polignac number, because 16172705 - 2⁸ = 16172449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16172707) 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 7 ways as a sum of consecutive naturals, for example, 85025 + ... + 85214.

It is an arithmetic number, because the mean of its divisors is an integer number (2553600).

Almost surely, 2^16172705 is an apocalyptic number.

It is an amenable number.

16172705 is a deficient number, since it is larger than the sum of its proper divisors (4256095).

16172705 is a wasteful number, since it uses less digits than its factorization.

16172705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170263.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 16172705 is about 4021.5301814111. The cubic root of 16172705 is about 252.8876117129.

Adding to 16172705 its reverse (50727161), we get a palindrome (66899866).

The spelling of 16172705 in words is "sixteen million, one hundred seventy-two thousand, seven hundred five".