4057221 has 8 divisors (see below), whose sum is σ = 6182464. Its totient is φ = 2318400.

The previous prime is 4057217. The next prime is 4057231. The reversal of 4057221 is 1227504.

4057221 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 4057221 - 2² = 4057217 is a prime.

It is a super-2 number, since 2×4057221² = 32922084485682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 193201 = 4057221 / (4 + 0 + 5 + 7 + 2 + 2 + 1).

It is a Duffinian number.

4057221 is strictly pandigital in base 8.

4057221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4057211) 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, 96580 + ... + 96621.

It is an arithmetic number, because the mean of its divisors is an integer number (772808).

Almost surely, 2^4057221 is an apocalyptic number.

It is an amenable number.

4057221 is a deficient number, since it is larger than the sum of its proper divisors (2125243).

4057221 is a wasteful number, since it uses less digits than its factorization.

4057221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193211.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 4057221 is about 2014.2544526449. The cubic root of 4057221 is about 159.4934631742.

It can be divided in two parts, 4057 and 221, that added together give a triangular number (4278 = T₉₂).

The spelling of 4057221 in words is "four million, fifty-seven thousand, two hundred twenty-one".