2175725 has 12 divisors (see below), whose sum is σ = 2791860. Its totient is φ = 1680000.

The previous prime is 2175721. The next prime is 2175727. The reversal of 2175725 is 5275712.

2175725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 26569 + 2149156 = 163^2 + 1466^2 .

It is not a de Polignac number, because 2175725 - 2² = 2175721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2175721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 776 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (232655).

2^2175725 is an apocalyptic number.

2175725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2175725 is a deficient number, since it is larger than the sum of its proper divisors (616135).

2175725 is a wasteful number, since it uses less digits than its factorization.

2175725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040 (or 3035 counting only the distinct ones).

The product of its digits is 4900, while the sum is 29.

The square root of 2175725 is about 1475.0338979156. The cubic root of 2175725 is about 129.5790129164.

The spelling of 2175725 in words is "two million, one hundred seventy-five thousand, seven hundred twenty-five".