16842825 has 18 divisors (see below), whose sum is σ = 30167774. Its totient is φ = 8982720.

The previous prime is 16842821. The next prime is 16842851. The reversal of 16842825 is 52824861.

It can be written as a sum of positive squares in 3 ways, for example, as 9 + 16842816 = 3^2 + 4104^2 .

It is not a de Polignac number, because 16842825 - 2² = 16842821 is a prime.

It is a super-3 number, since 3×16842825³ (a number of 23 digits) contains 333 as substring.

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 16842825.

It is not an unprimeable number, because it can be changed into a prime (16842821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37204 + ... + 37653.

Almost surely, 2^16842825 is an apocalyptic number.

16842825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16842825 is a deficient number, since it is larger than the sum of its proper divisors (13324949).

16842825 is a wasteful number, since it uses less digits than its factorization.

16842825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74873 (or 74865 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 16842825 is about 4104.0010964911. The cubic root of 16842825 is about 256.3332705779. Note that the first 3 decimals are identical.

The spelling of 16842825 in words is "sixteen million, eight hundred forty-two thousand, eight hundred twenty-five".