3831145 has 4 divisors (see below), whose sum is σ = 4597380. Its totient is φ = 3064912.

The previous prime is 3831131. The next prime is 3831167. The reversal of 3831145 is 5411383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5411383 = 971 ⋅5573.

It can be written as a sum of positive squares in 2 ways, for example, as 1447209 + 2383936 = 1203^2 + 1544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3831145 is a prime.

It is a super-2 number, since 2×3831145² = 29355344022050, which contains 22 as substring.

It is an unprimeable number.

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, 383110 + ... + 383119.

It is an arithmetic number, because the mean of its divisors is an integer number (1149345).

Almost surely, 2^3831145 is an apocalyptic number.

It is an amenable number.

3831145 is a deficient number, since it is larger than the sum of its proper divisors (766235).

3831145 is an equidigital number, since it uses as much as digits as its factorization.

3831145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766234.

The product of its digits is 1440, while the sum is 25.

The square root of 3831145 is about 1957.3310910523. The cubic root of 3831145 is about 156.4742444185.

The spelling of 3831145 in words is "three million, eight hundred thirty-one thousand, one hundred forty-five".