3861285 has 16 divisors (see below), whose sum is σ = 6310656. Its totient is φ = 2015168.

The previous prime is 3861269. The next prime is 3861289. The reversal of 3861285 is 5821683.

3861285 = 651² + 652² + ... + 659².

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3861285 - 2⁴ = 3861269 is a prime.

It is a Curzon number.

3861285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861289) 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 15 ways as a sum of consecutive naturals, for example, 2034 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (394416).

Almost surely, 2^3861285 is an apocalyptic number.

It is an amenable number.

3861285 is a deficient number, since it is larger than the sum of its proper divisors (2449371).

3861285 is a wasteful number, since it uses less digits than its factorization.

3861285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532.

The product of its digits is 11520, while the sum is 33.

The square root of 3861285 is about 1965.0152671163. The cubic root of 3861285 is about 156.8835058853.

The spelling of 3861285 in words is "three million, eight hundred sixty-one thousand, two hundred eighty-five".