1329967 has 4 divisors (see below), whose sum is σ = 1343776. Its totient is φ = 1316160.

The previous prime is 1329953. The next prime is 1329971. The reversal of 1329967 is 7699231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329907) 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 in 3 ways as a sum of consecutive naturals, for example, 6759 + ... + 6952.

It is an arithmetic number, because the mean of its divisors is an integer number (335944).

2^1329967 is an apocalyptic number.

1329967 is a deficient number, since it is larger than the sum of its proper divisors (13809).

1329967 is an equidigital number, since it uses as much as digits as its factorization.

1329967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13808.

The product of its digits is 20412, while the sum is 37.

The square root of 1329967 is about 1153.2419520638. The cubic root of 1329967 is about 109.9715353346.

It can be divided in two parts, 13299 and 67, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 1329967 in words is "one million, three hundred twenty-nine thousand, nine hundred sixty-seven".