2185975 has 12 divisors (see below), whose sum is σ = 2957400. Its totient is φ = 1589600.

The previous prime is 2185973. The next prime is 2185987. The reversal of 2185975 is 5795812.

It is not a de Polignac number, because 2185975 - 2¹ = 2185973 is a prime.

2185975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185973) 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 11 ways as a sum of consecutive naturals, for example, 3700 + ... + 4249.

It is an arithmetic number, because the mean of its divisors is an integer number (246450).

2^2185975 is an apocalyptic number.

2185975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2185975 is a deficient number, since it is larger than the sum of its proper divisors (771425).

2185975 is a wasteful number, since it uses less digits than its factorization.

2185975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970 (or 7965 counting only the distinct ones).

The product of its digits is 25200, while the sum is 37.

The square root of 2185975 is about 1478.5043117962. The cubic root of 2185975 is about 129.7821796155.

It can be divided in two parts, 2185 and 975, that added together give a triangular number (3160 = T₇₉).

The spelling of 2185975 in words is "two million, one hundred eighty-five thousand, nine hundred seventy-five".