16872257 has 4 divisors (see below), whose sum is σ = 16880640. Its totient is φ = 16863876.

The previous prime is 16872223. The next prime is 16872263. The reversal of 16872257 is 75227861.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75227861 = 1291 ⋅58271.

It is a cyclic number.

It is not a de Polignac number, because 16872257 - 2¹² = 16868161 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 16872257.

It is not an unprimeable number, because it can be changed into a prime (16802257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848 + ... + 5870.

It is an arithmetic number, because the mean of its divisors is an integer number (4220160).

Almost surely, 2^16872257 is an apocalyptic number.

It is an amenable number.

16872257 is a deficient number, since it is larger than the sum of its proper divisors (8383).

16872257 is an equidigital number, since it uses as much as digits as its factorization.

16872257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8382.

The product of its digits is 47040, while the sum is 38.

The square root of 16872257 is about 4107.5853003924. The cubic root of 16872257 is about 256.4824935772.

The spelling of 16872257 in words is "sixteen million, eight hundred seventy-two thousand, two hundred fifty-seven".