2170925 has 6 divisors (see below), whose sum is σ = 2691978. Its totient is φ = 1736720.

The previous prime is 2170919. The next prime is 2170937. The reversal of 2170925 is 5290712.

It can be written as a sum of positive squares in 3 ways, for example, as 329476 + 1841449 = 574^2 + 1357^2 .

It is not a de Polignac number, because 2170925 - 2¹⁴ = 2154541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2170894 and 2170903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43394 + ... + 43443.

It is an arithmetic number, because the mean of its divisors is an integer number (448663).

2^2170925 is an apocalyptic number.

2170925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2170925 is a deficient number, since it is larger than the sum of its proper divisors (521053).

2170925 is an equidigital number, since it uses as much as digits as its factorization.

2170925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86847 (or 86842 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2170925 is about 1473.4059182724. The cubic root of 2170925 is about 129.4836520262.

The spelling of 2170925 in words is "two million, one hundred seventy thousand, nine hundred twenty-five".