2185465 has 4 divisors (see below), whose sum is σ = 2622564. Its totient is φ = 1748368.

The previous prime is 2185439. The next prime is 2185471. The reversal of 2185465 is 5645812.

2185465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 906304 + 1279161 = 952^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185465 - 2⁵ = 2185433 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 218542 + ... + 218551.

It is an arithmetic number, because the mean of its divisors is an integer number (655641).

2^2185465 is an apocalyptic number.

It is an amenable number.

2185465 is a deficient number, since it is larger than the sum of its proper divisors (437099).

2185465 is an equidigital number, since it uses as much as digits as its factorization.

2185465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437098.

The product of its digits is 9600, while the sum is 31.

The square root of 2185465 is about 1478.3318301383. The cubic root of 2185465 is about 129.7720858648.

It can be divided in two parts, 2185 and 465, that multiplied together give a triangular number (1016025 = T₁₄₂₅).

The spelling of 2185465 in words is "two million, one hundred eighty-five thousand, four hundred sixty-five".