1329645 has 8 divisors (see below), whose sum is σ = 2127456. Its totient is φ = 709136.

The previous prime is 1329637. The next prime is 1329661. The reversal of 1329645 is 5469231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1329645 - 2³ = 1329637 is a prime.

It is a super-3 number, since 3×1329645³ = 7052260872885033375, which contains 333 as substring.

1329645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44307 + ... + 44336.

It is an arithmetic number, because the mean of its divisors is an integer number (265932).

2^1329645 is an apocalyptic number.

1329645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1329645 is a deficient number, since it is larger than the sum of its proper divisors (797811).

1329645 is an equidigital number, since it uses as much as digits as its factorization.

1329645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88651.

The product of its digits is 6480, while the sum is 30.

The square root of 1329645 is about 1153.1023371757. The cubic root of 1329645 is about 109.9626595022.

The spelling of 1329645 in words is "one million, three hundred twenty-nine thousand, six hundred forty-five".