4220957 has 4 divisors (see below), whose sum is σ = 4545660. Its totient is φ = 3896256.

The previous prime is 4220941. The next prime is 4220963. The reversal of 4220957 is 7590224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1196836 + 3024121 = 1094^2 + 1739^2 .

It is not a de Polignac number, because 4220957 - 2⁴ = 4220941 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 2⁵ + 2⁷ + 0 + 9⁴ + 5⁵ + 7⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220917) 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, 162332 + ... + 162357.

It is an arithmetic number, because the mean of its divisors is an integer number (1136415).

Almost surely, 2^4220957 is an apocalyptic number.

It is an amenable number.

4220957 is a deficient number, since it is larger than the sum of its proper divisors (324703).

4220957 is a wasteful number, since it uses less digits than its factorization.

4220957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324702.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 4220957 is about 2054.4967753686. The cubic root of 4220957 is about 161.6107736543.

The spelling of 4220957 in words is "four million, two hundred twenty thousand, nine hundred fifty-seven".