16431125 has 8 divisors (see below), whose sum is σ = 20506200. Its totient is φ = 13144800.

The previous prime is 16431101. The next prime is 16431127. The reversal of 16431125 is 52113461.

It can be written as a sum of positive squares in 4 ways, for example, as 61009 + 16370116 = 247^2 + 4046^2 .

It is not a de Polignac number, because 16431125 - 2¹⁰ = 16430101 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16431125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16431127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65600 + ... + 65849.

It is an arithmetic number, because the mean of its divisors is an integer number (2563275).

Almost surely, 2^16431125 is an apocalyptic number.

It is an amenable number.

16431125 is a deficient number, since it is larger than the sum of its proper divisors (4075075).

16431125 is an equidigital number, since it uses as much as digits as its factorization.

16431125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131464 (or 131454 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 16431125 is about 4053.5324101332. The cubic root of 16431125 is about 254.2274452278.

Adding to 16431125 its reverse (52113461), we get a palindrome (68544586).

The spelling of 16431125 in words is "sixteen million, four hundred thirty-one thousand, one hundred twenty-five".