2085729 has 4 divisors (see below), whose sum is σ = 2780976. Its totient is φ = 1390484.

The previous prime is 2085703. The next prime is 2085731. The reversal of 2085729 is 9275802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2085729 - 2⁵ = 2085697 is a prime.

It is a super-2 number, since 2×2085729² = 8700530922882, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2085729.

It is not an unprimeable number, because it can be changed into a prime (2085739) 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 3 ways as a sum of consecutive naturals, for example, 347619 + ... + 347624.

It is an arithmetic number, because the mean of its divisors is an integer number (695244).

2^2085729 is an apocalyptic number.

It is an amenable number.

2085729 is a deficient number, since it is larger than the sum of its proper divisors (695247).

2085729 is an equidigital number, since it uses as much as digits as its factorization.

2085729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695246.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 2085729 is about 1444.2053178132. The cubic root of 2085729 is about 127.7671752317.

The spelling of 2085729 in words is "two million, eighty-five thousand, seven hundred twenty-nine".