3821811 has 16 divisors (see below), whose sum is σ = 5873664. Its totient is φ = 2165184.

The previous prime is 3821809. The next prime is 3821813. The reversal of 3821811 is 1181283.

It is an interprime number because it is at equal distance from previous prime (3821809) and next prime (3821813).

It is not a de Polignac number, because 3821811 - 2¹ = 3821809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1951 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (367104).

Almost surely, 2^3821811 is an apocalyptic number.

3821811 is a deficient number, since it is larger than the sum of its proper divisors (2051853).

3821811 is a wasteful number, since it uses less digits than its factorization.

3821811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570.

The product of its digits is 384, while the sum is 24.

The square root of 3821811 is about 1954.9452677761. The cubic root of 3821811 is about 156.3470658748.

The spelling of 3821811 in words is "three million, eight hundred twenty-one thousand, eight hundred eleven".