3854921 has 4 divisors (see below), whose sum is σ = 4405632. Its totient is φ = 3304212.

The previous prime is 3854899. The next prime is 3854923. The reversal of 3854921 is 1294583.

3854921 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 a cyclic number.

It is not a de Polignac number, because 3854921 - 2¹⁸ = 3592777 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3854923) 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, 275345 + ... + 275358.

It is an arithmetic number, because the mean of its divisors is an integer number (1101408).

Almost surely, 2^3854921 is an apocalyptic number.

It is an amenable number.

3854921 is a deficient number, since it is larger than the sum of its proper divisors (550711).

3854921 is an equidigital number, since it uses as much as digits as its factorization.

3854921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550710.

The product of its digits is 8640, while the sum is 32.

The square root of 3854921 is about 1963.3952734995. The cubic root of 3854921 is about 156.7972689940.

The spelling of 3854921 in words is "three million, eight hundred fifty-four thousand, nine hundred twenty-one".