2185005 has 16 divisors (see below), whose sum is σ = 3617280.
Its totient is φ = 1124928.
The previous prime is 2184997. The next prime is 2185009. The reversal of 2185005 is 5005812.
2185005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 2185005 - 23 = 2184997 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2185009) 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 15 ways as a sum of consecutive naturals, for example, 2077 + ... + 2946.
It is an arithmetic number, because the mean of its divisors is an integer number (226080).
22185005 is an apocalyptic number.
It is an amenable number.
2185005 is a deficient number, since it is larger than the sum of its proper divisors (1432275).
2185005 is a wasteful number, since it uses less digits than its factorization.
2185005 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5060.
The product of its (nonzero) digits is 400, while the sum is 21.
The square root of 2185005 is about 1478.1762411837.
The cubic root of 2185005 is about 129.7629803505.
It can be divided in two parts, 21 and 85005, that multiplied together give a triangular number (1785105 = T1889).
The spelling of 2185005 in words is "two million, one hundred eighty-five thousand, five".