3861121 has 4 divisors (see below), whose sum is σ = 4212144. Its totient is φ = 3510100.

The previous prime is 3861119. The next prime is 3861167. The reversal of 3861121 is 1211683.

3861121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 3861121 - 2¹ = 3861119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3861092 and 3861101.

It is not an unprimeable number, because it can be changed into a prime (3861521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175495 + ... + 175516.

It is an arithmetic number, because the mean of its divisors is an integer number (1053036).

Almost surely, 2^3861121 is an apocalyptic number.

It is an amenable number.

3861121 is a deficient number, since it is larger than the sum of its proper divisors (351023).

3861121 is a wasteful number, since it uses less digits than its factorization.

3861121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351022.

The product of its digits is 288, while the sum is 22.

The square root of 3861121 is about 1964.9735367175. The cubic root of 3861121 is about 156.8812847543.

The spelling of 3861121 in words is "three million, eight hundred sixty-one thousand, one hundred twenty-one".