4220291 has 4 divisors (see below), whose sum is σ = 4267800. Its totient is φ = 4172784.

The previous prime is 4220287. The next prime is 4220297. The reversal of 4220291 is 1920224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4220291 - 2² = 4220287 is a prime.

It is a super-2 number, since 2×4220291² = 35621712249362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4220297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23621 + ... + 23798.

It is an arithmetic number, because the mean of its divisors is an integer number (1066950).

Almost surely, 2^4220291 is an apocalyptic number.

4220291 is a deficient number, since it is larger than the sum of its proper divisors (47509).

4220291 is an equidigital number, since it uses as much as digits as its factorization.

4220291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47508.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4220291 is about 2054.3346854882. The cubic root of 4220291 is about 161.6022733358.

The spelling of 4220291 in words is "four million, two hundred twenty thousand, two hundred ninety-one".