1329540 has 24 divisors (see below), whose sum is σ = 3722880. Its totient is φ = 354528.

The previous prime is 1329533. The next prime is 1329541. The reversal of 1329540 is 459231.

It is a super-2 number, since 2×1329540² = 3535353223200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1329540.

It is not an unprimeable number, because it can be changed into a prime (1329541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11020 + ... + 11139.

It is an arithmetic number, because the mean of its divisors is an integer number (155120).

2^1329540 is an apocalyptic number.

1329540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1329540 is an abundant number, since it is smaller than the sum of its proper divisors (2393340).

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

1329540 is a wasteful number, since it uses less digits than its factorization.

1329540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22171 (or 22169 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1329540 is about 1153.0568069267. The cubic root of 1329540 is about 109.9597648992.

The spelling of 1329540 in words is "one million, three hundred twenty-nine thousand, five hundred forty".