4220381 has 8 divisors (see below), whose sum is σ = 4618944. Its totient is φ = 3824320.

The previous prime is 4220357. The next prime is 4220387. The reversal of 4220381 is 1830224.

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 4220381 - 2¹⁰ = 4219357 is a prime.

It is a super-2 number, since 2×4220381² = 35623231570322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220387) 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 7 ways as a sum of consecutive naturals, for example, 6200 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (577368).

Almost surely, 2^4220381 is an apocalyptic number.

It is an amenable number.

4220381 is a deficient number, since it is larger than the sum of its proper divisors (398563).

4220381 is a wasteful number, since it uses less digits than its factorization.

4220381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4220381 is about 2054.3565902735. The cubic root of 4220381 is about 161.6034220798.

The spelling of 4220381 in words is "four million, two hundred twenty thousand, three hundred eighty-one".