16869725 has 6 divisors (see below), whose sum is σ = 20918490. Its totient is φ = 13495760.

The previous prime is 16869719. The next prime is 16869731. The reversal of 16869725 is 52796861.

It is an interprime number because it is at equal distance from previous prime (16869719) and next prime (16869731).

It can be written as a sum of positive squares in 3 ways, for example, as 1923769 + 14945956 = 1387^2 + 3866^2 .

It is not a de Polignac number, because 16869725 - 2⁴ = 16869709 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 337370 + ... + 337419.

It is an arithmetic number, because the mean of its divisors is an integer number (3486415).

Almost surely, 2^16869725 is an apocalyptic number.

It is an amenable number.

16869725 is a deficient number, since it is larger than the sum of its proper divisors (4048765).

16869725 is an equidigital number, since it uses as much as digits as its factorization.

16869725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674799 (or 674794 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 16869725 is about 4107.2770785522. The cubic root of 16869725 is about 256.4696629255.

It can be divided in two parts, 1686 and 9725, that added together give a palindrome (11411).

The spelling of 16869725 in words is "sixteen million, eight hundred sixty-nine thousand, seven hundred twenty-five".