3885721 has 8 divisors (see below), whose sum is σ = 4455360. Its totient is φ = 3319728.

The previous prime is 3885719. The next prime is 3885727. The reversal of 3885721 is 1275883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3885721 - 2¹ = 3885719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3885727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2010 + ... + 3436.

It is an arithmetic number, because the mean of its divisors is an integer number (556920).

Almost surely, 2^3885721 is an apocalyptic number.

It is an amenable number.

3885721 is a deficient number, since it is larger than the sum of its proper divisors (569639).

3885721 is a wasteful number, since it uses less digits than its factorization.

3885721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823.

The product of its digits is 13440, while the sum is 34.

The square root of 3885721 is about 1971.2232242950. The cubic root of 3885721 is about 157.2137540383.

The spelling of 3885721 in words is "three million, eight hundred eighty-five thousand, seven hundred twenty-one".