4437421 has 2 divisors, whose sum is σ = 4437422. Its totient is φ = 4437420.

The previous prime is 4437409. The next prime is 4437427. The reversal of 4437421 is 1247344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3258025 + 1179396 = 1805^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 4437421 - 2⁹ = 4436909 is a prime.

It is a d-powerful number, because it can be written as 4⁴ + 4⁸ + 3¹¹ + 7² + 4¹¹ + 2⁷ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4437427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2218710 + 2218711.

It is an arithmetic number, because the mean of its divisors is an integer number (2218711).

Almost surely, 2^4437421 is an apocalyptic number.

It is an amenable number.

4437421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4437421 is an equidigital number, since it uses as much as digits as its factorization.

4437421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 4437421 is about 2106.5186920604. The cubic root of 4437421 is about 164.3274861104.

The spelling of 4437421 in words is "four million, four hundred thirty-seven thousand, four hundred twenty-one".