1320156 has 18 divisors (see below), whose sum is σ = 3337152. Its totient is φ = 440040.

The previous prime is 1320149. The next prime is 1320157. The reversal of 1320156 is 6510231.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18300 + ... + 18371.

2^1320156 is an apocalyptic number.

It is an amenable number.

1320156 is an abundant number, since it is smaller than the sum of its proper divisors (2016996).

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

1320156 is a wasteful number, since it uses less digits than its factorization.

1320156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36681 (or 36676 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1320156 is about 1148.9804175877. The cubic root of 1320156 is about 109.7004522412.

Adding to 1320156 its reverse (6510231), we get a palindrome (7830387).

The spelling of 1320156 in words is "one million, three hundred twenty thousand, one hundred fifty-six".