4220591 has 8 divisors (see below), whose sum is σ = 4300800. Its totient is φ = 4141368.

The previous prime is 4220563. The next prime is 4220597. The reversal of 4220591 is 1950224.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4220591 is a prime.

It is a d-powerful number, because it can be written as 4 + 2¹² + 2²² + 0 + 5⁶ + 9⁴ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220597) 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, 21110 + ... + 21308.

It is an arithmetic number, because the mean of its divisors is an integer number (537600).

Almost surely, 2^4220591 is an apocalyptic number.

4220591 is a deficient number, since it is larger than the sum of its proper divisors (80209).

4220591 is a wasteful number, since it uses less digits than its factorization.

4220591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 4220591 is about 2054.4077005307. The cubic root of 4220591 is about 161.6061024188.

The spelling of 4220591 in words is "four million, two hundred twenty thousand, five hundred ninety-one".