4221755 has 4 divisors (see below), whose sum is σ = 5066112. Its totient is φ = 3377400.

The previous prime is 4221751. The next prime is 4221761. The reversal of 4221755 is 5571224.

4221755 = T₁₂₉₇ + T₁₂₉₈ + ... + T₁₃₀₁.

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

It is not a de Polignac number, because 4221755 - 2² = 4221751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221751) 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 3 ways as a sum of consecutive naturals, for example, 422171 + ... + 422180.

It is an arithmetic number, because the mean of its divisors is an integer number (1266528).

Almost surely, 2^4221755 is an apocalyptic number.

4221755 is a deficient number, since it is larger than the sum of its proper divisors (844357).

4221755 is an equidigital number, since it uses as much as digits as its factorization.

4221755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844356.

The product of its digits is 2800, while the sum is 26.

The square root of 4221755 is about 2054.6909743317. The cubic root of 4221755 is about 161.6209575432.

Adding to 4221755 its reverse (5571224), we get a palindrome (9792979).

The spelling of 4221755 in words is "four million, two hundred twenty-one thousand, seven hundred fifty-five".