1329009 has 32 divisors (see below), whose sum is σ = 2156544. Its totient is φ = 718080.

The previous prime is 1328981. The next prime is 1329011. The reversal of 1329009 is 9009231.

It is a happy number.

It is not a de Polignac number, because 1329009 - 2⁹ = 1328497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1329009.

It is not an unprimeable number, because it can be changed into a prime (1329109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12852 + ... + 12954.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2^1329009 is an apocalyptic number.

It is an amenable number.

1329009 is a deficient number, since it is larger than the sum of its proper divisors (827535).

1329009 is a wasteful number, since it uses less digits than its factorization.

1329009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1329009 is about 1152.8265264124. The cubic root of 1329009 is about 109.9451241437.

The spelling of 1329009 in words is "one million, three hundred twenty-nine thousand, nine".