3985015 has 4 divisors (see below), whose sum is σ = 4782024. Its totient is φ = 3188008.

The previous prime is 3985013. The next prime is 3985027. The reversal of 3985015 is 5105893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5105893 = 13 ⋅392761.

It is a cyclic number.

It is not a de Polignac number, because 3985015 - 2¹ = 3985013 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398497 + ... + 398506.

It is an arithmetic number, because the mean of its divisors is an integer number (1195506).

Almost surely, 2^3985015 is an apocalyptic number.

3985015 is a deficient number, since it is larger than the sum of its proper divisors (797009).

3985015 is an equidigital number, since it uses as much as digits as its factorization.

3985015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797008.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 3985015 is about 1996.2502348153. The cubic root of 3985015 is about 158.5416304384.

The spelling of 3985015 in words is "three million, nine hundred eighty-five thousand, fifteen".