2190085 has 4 divisors (see below), whose sum is σ = 2628108. Its totient is φ = 1752064.

The previous prime is 2190079. The next prime is 2190091. The reversal of 2190085 is 5800912.

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

It is an interprime number because it is at equal distance from previous prime (2190079) and next prime (2190091).

It can be written as a sum of positive squares in 2 ways, for example, as 567009 + 1623076 = 753^2 + 1274^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190085 - 2³ = 2190077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219004 + ... + 219013.

It is an arithmetic number, because the mean of its divisors is an integer number (657027).

2^2190085 is an apocalyptic number.

It is an amenable number.

2190085 is a deficient number, since it is larger than the sum of its proper divisors (438023).

2190085 is an equidigital number, since it uses as much as digits as its factorization.

2190085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438022.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2190085 is about 1479.8935772548. The cubic root of 2190085 is about 129.8634661215.

Adding to 2190085 its reverse (5800912), we get a palindrome (7990997).

The spelling of 2190085 in words is "two million, one hundred ninety thousand, eighty-five".