3821091 has 16 divisors (see below), whose sum is σ = 5311488. Its totient is φ = 2440800.

The previous prime is 3821057. The next prime is 3821099. The reversal of 3821091 is 1901283.

3821091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3821091 - 2⁷ = 3820963 is a prime.

3821091 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821099) 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 15 ways as a sum of consecutive naturals, for example, 16720 + ... + 16946.

It is an arithmetic number, because the mean of its divisors is an integer number (331968).

Almost surely, 2^3821091 is an apocalyptic number.

3821091 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3821091 is a deficient number, since it is larger than the sum of its proper divisors (1490397).

3821091 is a wasteful number, since it uses less digits than its factorization.

3821091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 3821091 is about 1954.7611107243. The cubic root of 3821091 is about 156.3372470605.

The spelling of 3821091 in words is "three million, eight hundred twenty-one thousand, ninety-one".