2171441 has 2 divisors, whose sum is σ = 2171442. Its totient is φ = 2171440.

The previous prime is 2171437. The next prime is 2171497. The reversal of 2171441 is 1441712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1201216 + 970225 = 1096^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171441 - 2² = 2171437 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (2171431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085720 + 1085721.

It is an arithmetic number, because the mean of its divisors is an integer number (1085721).

2^2171441 is an apocalyptic number.

It is an amenable number.

2171441 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171441 is an equidigital number, since it uses as much as digits as its factorization.

2171441 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2171441 is about 1473.5810123641. The cubic root of 2171441 is about 129.4939100608.

The spelling of 2171441 in words is "two million, one hundred seventy-one thousand, four hundred forty-one".