2172125 has 8 divisors (see below), whose sum is σ = 2710968. Its totient is φ = 1737600.

The previous prime is 2172113. The next prime is 2172151. The reversal of 2172125 is 5212712.

It can be written as a sum of positive squares in 4 ways, for example, as 466489 + 1705636 = 683^2 + 1306^2 .

It is not a de Polignac number, because 2172125 - 2⁴ = 2172109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172097 and 2172106.

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, 8564 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (338871).

2^2172125 is an apocalyptic number.

2172125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2172125 is a deficient number, since it is larger than the sum of its proper divisors (538843).

2172125 is an equidigital number, since it uses as much as digits as its factorization.

2172125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17392 (or 17382 counting only the distinct ones).

The product of its digits is 280, while the sum is 20.

The square root of 2172125 is about 1473.8130817712. The cubic root of 2172125 is about 129.5075054161.

Adding to 2172125 its reverse (5212712), we get a palindrome (7384837).

The spelling of 2172125 in words is "two million, one hundred seventy-two thousand, one hundred twenty-five".