3861139 has 4 divisors (see below), whose sum is σ = 3874024. Its totient is φ = 3848256.

The previous prime is 3861119. The next prime is 3861167. The reversal of 3861139 is 9311683.

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

It is a cyclic number.

It is not a de Polignac number, because 3861139 - 2¹⁵ = 3828371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3861139.

It is not an unprimeable number, because it can be changed into a prime (3861119) 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, 5982 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (968506).

Almost surely, 2^3861139 is an apocalyptic number.

3861139 is a deficient number, since it is larger than the sum of its proper divisors (12885).

3861139 is a wasteful number, since it uses less digits than its factorization.

3861139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12884.

The product of its digits is 3888, while the sum is 31.

The square root of 3861139 is about 1964.9781169265. The cubic root of 3861139 is about 156.8815285400.

The spelling of 3861139 in words is "three million, eight hundred sixty-one thousand, one hundred thirty-nine".