1721327 has 2 divisors, whose sum is σ = 1721328. Its totient is φ = 1721326.

The previous prime is 1721323. The next prime is 1721339. The reversal of 1721327 is 7231271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1721327 - 2² = 1721323 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1721323) 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, 860663 + 860664.

It is an arithmetic number, because the mean of its divisors is an integer number (860664).

2^1721327 is an apocalyptic number.

1721327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1721327 is an equidigital number, since it uses as much as digits as its factorization.

1721327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588, while the sum is 23.

The square root of 1721327 is about 1311.9935213255. The cubic root of 1721327 is about 119.8453331444.

Adding to 1721327 its reverse (7231271), we get a palindrome (8952598).

It can be divided in two parts, 1721 and 327, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1721327 in words is "one million, seven hundred twenty-one thousand, three hundred twenty-seven".