1329081 has 16 divisors (see below), whose sum is σ = 1947456. Its totient is φ = 801216.

The previous prime is 1329073. The next prime is 1329091. The reversal of 1329081 is 1809231.

It is not a de Polignac number, because 1329081 - 2³ = 1329073 is a prime.

It is a super-2 number, since 2×1329081² = 3532912609122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329011) 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 15 ways as a sum of consecutive naturals, for example, 1746 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (121716).

2^1329081 is an apocalyptic number.

It is an amenable number.

1329081 is a deficient number, since it is larger than the sum of its proper divisors (618375).

1329081 is a wasteful number, since it uses less digits than its factorization.

1329081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1329081 is about 1152.8577535845. The cubic root of 1329081 is about 109.9471095594.

The spelling of 1329081 in words is "one million, three hundred twenty-nine thousand, eighty-one".