3221857 has 8 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 2992704.

The previous prime is 3221819. The next prime is 3221899. The reversal of 3221857 is 7581223.

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 3221857 - 2¹⁵ = 3189089 is a prime.

It is an Ulam number.

It is a Duffinian number.

3221857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3221807) 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, 144 + ... + 2542.

It is an arithmetic number, because the mean of its divisors is an integer number (432000).

Almost surely, 2^3221857 is an apocalyptic number.

It is an amenable number.

3221857 is a deficient number, since it is larger than the sum of its proper divisors (234143).

3221857 is a wasteful number, since it uses less digits than its factorization.

3221857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its digits is 3360, while the sum is 28.

The square root of 3221857 is about 1794.9532027326. The cubic root of 3221857 is about 147.6960067753.

The spelling of 3221857 in words is "three million, two hundred twenty-one thousand, eight hundred fifty-seven".