4220849 has 4 divisors (see below), whose sum is σ = 4334964. Its totient is φ = 4106736.

The previous prime is 4220819. The next prime is 4220851. The reversal of 4220849 is 9480224.

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 1638400 + 2582449 = 1280^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220849 - 2¹² = 4216753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4220809) 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, 57002 + ... + 57075.

It is an arithmetic number, because the mean of its divisors is an integer number (1083741).

Almost surely, 2^4220849 is an apocalyptic number.

It is an amenable number.

4220849 is a deficient number, since it is larger than the sum of its proper divisors (114115).

4220849 is a wasteful number, since it uses less digits than its factorization.

4220849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114114.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 4220849 is about 2054.4704913919. The cubic root of 4220849 is about 161.6093952850.

The spelling of 4220849 in words is "four million, two hundred twenty thousand, eight hundred forty-nine".