1329871 has 2 divisors, whose sum is σ = 1329872. Its totient is φ = 1329870.

The previous prime is 1329863. The next prime is 1329899. The reversal of 1329871 is 1789231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1329871 - 2³ = 1329863 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664935 + 664936.

It is an arithmetic number, because the mean of its divisors is an integer number (664936).

2^1329871 is an apocalyptic number.

1329871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329871 is an equidigital number, since it uses as much as digits as its factorization.

1329871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 1329871 is about 1153.2003295178. The cubic root of 1329871 is about 109.9688892736.

The spelling of 1329871 in words is "one million, three hundred twenty-nine thousand, eight hundred seventy-one".