4002085 has 4 divisors (see below), whose sum is σ = 4802508. Its totient is φ = 3201664.

The previous prime is 4002077. The next prime is 4002101. The reversal of 4002085 is 5802004.

It is a happy number.

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 1292769 + 2709316 = 1137^2 + 1646^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002085 - 2³ = 4002077 is a prime.

It is an Ulam number.

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, 400204 + ... + 400213.

It is an arithmetic number, because the mean of its divisors is an integer number (1200627).

Almost surely, 2^4002085 is an apocalyptic number.

It is an amenable number.

4002085 is a deficient number, since it is larger than the sum of its proper divisors (800423).

4002085 is an equidigital number, since it uses as much as digits as its factorization.

4002085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800422.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 4002085 is about 2000.5211820923. The cubic root of 4002085 is about 158.7676814993.

Adding to 4002085 its reverse (5802004), we get a palindrome (9804089).

It can be divided in two parts, 400 and 2085, that added together give a triangular number (2485 = T₇₀).

The spelling of 4002085 in words is "four million, two thousand, eighty-five".