4401421 has 2 divisors, whose sum is σ = 4401422. Its totient is φ = 4401420.

The previous prime is 4401413. The next prime is 4401427. The reversal of 4401421 is 1241044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3222025 + 1179396 = 1795^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 4401421 - 2³ = 4401413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4401395 and 4401404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4401427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2200710 + 2200711.

It is an arithmetic number, because the mean of its divisors is an integer number (2200711).

Almost surely, 2^4401421 is an apocalyptic number.

It is an amenable number.

4401421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4401421 is an equidigital number, since it uses as much as digits as its factorization.

4401421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4401421 is about 2097.9563865820. The cubic root of 4401421 is about 163.8818924567.

Adding to 4401421 its reverse (1241044), we get a palindrome (5642465).

The spelling of 4401421 in words is "four million, four hundred one thousand, four hundred twenty-one".