1441721 has 2 divisors, whose sum is σ = 1441722. Its totient is φ = 1441720.

The previous prime is 1441703. The next prime is 1441723. The reversal of 1441721 is 1271441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 144400 = 1139^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1441721 - 2¹⁴ = 1425337 is a prime.

It is a Sophie Germain prime.

Together with 1441723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1441693 and 1441702.

It is not a weakly prime, because it can be changed into another prime (1441723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720860 + 720861.

It is an arithmetic number, because the mean of its divisors is an integer number (720861).

2^1441721 is an apocalyptic number.

It is an amenable number.

1441721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1441721 is an equidigital number, since it uses as much as digits as its factorization.

1441721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 20.

The square root of 1441721 is about 1200.7168692077. The cubic root of 1441721 is about 112.9692923060.

It can be divided in two parts, 1441 and 721, that multiplied together give a triangular number (1038961 = T₁₄₄₁).

The spelling of 1441721 in words is "one million, four hundred forty-one thousand, seven hundred twenty-one".