16872505 has 8 divisors (see below), whose sum is σ = 21804552. Its totient is φ = 12459648.

The previous prime is 16872473. The next prime is 16872521. The reversal of 16872505 is 50527861.

It can be written as a sum of positive squares in 4 ways, for example, as 1024144 + 15848361 = 1012^2 + 3981^2 .

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 16872505 - 2⁵ = 16872473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129724 + ... + 129853.

It is an arithmetic number, because the mean of its divisors is an integer number (2725569).

Almost surely, 2^16872505 is an apocalyptic number.

It is an amenable number.

16872505 is a deficient number, since it is larger than the sum of its proper divisors (4932047).

16872505 is a wasteful number, since it uses less digits than its factorization.

16872505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259595.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 16872505 is about 4107.6154883338. The cubic root of 16872505 is about 256.4837502229.

The spelling of 16872505 in words is "sixteen million, eight hundred seventy-two thousand, five hundred five".