1329140 has 12 divisors (see below), whose sum is σ = 2791236. Its totient is φ = 531648.

The previous prime is 1329131. The next prime is 1329143. The reversal of 1329140 is 419231.

It can be written as a sum of positive squares in 2 ways, for example, as 364816 + 964324 = 604^2 + 982^2 .

It is a super-2 number, since 2×1329140² = 3533226279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 66457 = 1329140 / (1 + 3 + 2 + 9 + 1 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329143) 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, 33209 + ... + 33248.

It is an arithmetic number, because the mean of its divisors is an integer number (232603).

2^1329140 is an apocalyptic number.

1329140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1329140 is an abundant number, since it is smaller than the sum of its proper divisors (1462096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1329140 is a wasteful number, since it uses less digits than its factorization.

1329140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66466 (or 66464 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1329140 is about 1152.8833418868. The cubic root of 1329140 is about 109.9487364438.

Subtracting from 1329140 its reverse (419231), we obtain a palindrome (909909).

It can be divided in two parts, 13291 and 40, that added together give a palindrome (13331).

The spelling of 1329140 in words is "one million, three hundred twenty-nine thousand, one hundred forty".