1329971 has 2 divisors, whose sum is σ = 1329972. Its totient is φ = 1329970.

The previous prime is 1329953. The next prime is 1330001. The reversal of 1329971 is 1799231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1329971 - 2⁶ = 1329907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1329941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664985 + 664986.

It is an arithmetic number, because the mean of its divisors is an integer number (664986).

2^1329971 is an apocalyptic number.

1329971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329971 is an equidigital number, since it uses as much as digits as its factorization.

1329971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 32.

The square root of 1329971 is about 1153.2436863040. The cubic root of 1329971 is about 109.9716455843.

The spelling of 1329971 in words is "one million, three hundred twenty-nine thousand, nine hundred seventy-one".