16881125 has 8 divisors (see below), whose sum is σ = 21067800. Its totient is φ = 13504800.

The previous prime is 16881097. The next prime is 16881169. The reversal of 16881125 is 52118861.

It can be written as a sum of positive squares in 4 ways, for example, as 3928324 + 12952801 = 1982^2 + 3599^2 .

It is not a de Polignac number, because 16881125 - 2⁶ = 16881061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16881091 and 16881100.

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 7 ways as a sum of consecutive naturals, for example, 67400 + ... + 67649.

It is an arithmetic number, because the mean of its divisors is an integer number (2633475).

Almost surely, 2^16881125 is an apocalyptic number.

It is an amenable number.

16881125 is a deficient number, since it is larger than the sum of its proper divisors (4186675).

16881125 is an equidigital number, since it uses as much as digits as its factorization.

16881125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135064 (or 135054 counting only the distinct ones).

The product of its digits is 3840, while the sum is 32.

The square root of 16881125 is about 4108.6646249116. The cubic root of 16881125 is about 256.5274211445.

Adding to 16881125 its reverse (52118861), we get a palindrome (68999986).

The spelling of 16881125 in words is "sixteen million, eight hundred eighty-one thousand, one hundred twenty-five".