1142320 has 40 divisors (see below), whose sum is σ = 2700720. Its totient is φ = 449280.

The previous prime is 1142311. The next prime is 1142321. The reversal of 1142320 is 232411.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1142320.

It is not an unprimeable number, because it can be changed into a prime (1142321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8655 + ... + 8785.

It is an arithmetic number, because the mean of its divisors is an integer number (67518).

2^1142320 is an apocalyptic number.

1142320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350360).

1142320 is an abundant number, since it is smaller than the sum of its proper divisors (1558400).

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

1142320 is a wasteful number, since it uses less digits than its factorization.

1142320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1142320 is about 1068.7937125564. The cubic root of 1142320 is about 104.5352093987.

Adding to 1142320 its reverse (232411), we get a palindrome (1374731).

Subtracting from 1142320 its reverse (232411), we obtain a palindrome (909909).

The spelling of 1142320 in words is "one million, one hundred forty-two thousand, three hundred twenty".