1329156 has 48 divisors (see below), whose sum is σ = 3566080. Its totient is φ = 427680.

The previous prime is 1329143. The next prime is 1329161. The reversal of 1329156 is 6519231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3150 + ... + 3546.

2^1329156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1329156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783040).

1329156 is an abundant number, since it is smaller than the sum of its proper divisors (2236924).

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

1329156 is a wasteful number, since it uses less digits than its factorization.

1329156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 433 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1329156 is about 1152.8902809895. The cubic root of 1329156 is about 109.9491776245.

It can be divided in two parts, 1329 and 156, that added together give a triangular number (1485 = T₅₄).

The spelling of 1329156 in words is "one million, three hundred twenty-nine thousand, one hundred fifty-six".