3845181 has 4 divisors (see below), whose sum is σ = 5126912. Its totient is φ = 2563452.

The previous prime is 3845173. The next prime is 3845183. The reversal of 3845181 is 1815483.

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 3845181 - 2³ = 3845173 is a prime.

It is a super-2 number, since 2×3845181² = 29570833845522, which contains 22 as substring.

It is a D-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 (3845183) 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, 640861 + ... + 640866.

It is an arithmetic number, because the mean of its divisors is an integer number (1281728).

Almost surely, 2^3845181 is an apocalyptic number.

It is an amenable number.

3845181 is a deficient number, since it is larger than the sum of its proper divisors (1281731).

3845181 is a wasteful number, since it uses less digits than its factorization.

3845181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281730.

The product of its digits is 3840, while the sum is 30.

The square root of 3845181 is about 1960.9133076197. The cubic root of 3845181 is about 156.6651008344.

It can be divided in two parts, 384 and 5181, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 3845181 in words is "three million, eight hundred forty-five thousand, one hundred eighty-one".