16217125 has 8 divisors (see below), whose sum is σ = 20239128. Its totient is φ = 12973600.

The previous prime is 16217087. The next prime is 16217141. The reversal of 16217125 is 52171261.

It can be written as a sum of positive squares in 4 ways, for example, as 352836 + 15864289 = 594^2 + 3983^2 .

It is not a de Polignac number, because 16217125 - 2¹⁹ = 15692837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 16217125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64744 + ... + 64993.

It is an arithmetic number, because the mean of its divisors is an integer number (2529891).

Almost surely, 2^16217125 is an apocalyptic number.

It is an amenable number.

16217125 is a deficient number, since it is larger than the sum of its proper divisors (4022003).

16217125 is an equidigital number, since it uses as much as digits as its factorization.

16217125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129752 (or 129742 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 16217125 is about 4027.0491678151. The cubic root of 16217125 is about 253.1189273552.

Adding to 16217125 its reverse (52171261), we get a palindrome (68388386).

It can be divided in two parts, 1 and 6217125, that added together give a palindrome (6217126).

The spelling of 16217125 in words is "sixteen million, two hundred seventeen thousand, one hundred twenty-five".