1329739 has 4 divisors (see below), whose sum is σ = 1351600. Its totient is φ = 1307880.

The previous prime is 1329733. The next prime is 1329761. The reversal of 1329739 is 9379231.

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

It is a cyclic number.

It is not a de Polignac number, because 1329739 - 2⁵ = 1329707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1329733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10839 + ... + 10960.

It is an arithmetic number, because the mean of its divisors is an integer number (337900).

2^1329739 is an apocalyptic number.

1329739 is a deficient number, since it is larger than the sum of its proper divisors (21861).

1329739 is an equidigital number, since it uses as much as digits as its factorization.

1329739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21860.

The product of its digits is 10206, while the sum is 34.

The square root of 1329739 is about 1153.1430960640. The cubic root of 1329739 is about 109.9652507318.

The spelling of 1329739 in words is "one million, three hundred twenty-nine thousand, seven hundred thirty-nine".