4224991 has 2 divisors, whose sum is σ = 4224992. Its totient is φ = 4224990.

The previous prime is 4224977. The next prime is 4225003. The reversal of 4224991 is 1994224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4224991 - 2¹⁷ = 4093919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4224901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2112495 + 2112496.

It is an arithmetic number, because the mean of its divisors is an integer number (2112496).

Almost surely, 2^4224991 is an apocalyptic number.

4224991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4224991 is an equidigital number, since it uses as much as digits as its factorization.

4224991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 4224991 is about 2055.4782898391. The cubic root of 4224991 is about 161.6622414679.

It can be divided in two parts, 422499 and 1, that added together give a square (422500 = 650²).

The spelling of 4224991 in words is "four million, two hundred twenty-four thousand, nine hundred ninety-one".