1145320 has 64 divisors (see below), whose sum is σ = 2980800. Its totient is φ = 391680.

The previous prime is 1145311. The next prime is 1145323. The reversal of 1145320 is 235411.

It is a junction number, because it is equal to n+sod(n) for n = 1145294 and 1145303.

It is not an unprimeable number, because it can be changed into a prime (1145323) 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 15 ways as a sum of consecutive naturals, for example, 8292 + ... + 8428.

It is an arithmetic number, because the mean of its divisors is an integer number (46575).

2^1145320 is an apocalyptic number.

1145320 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 1145320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490400).

1145320 is an abundant number, since it is smaller than the sum of its proper divisors (1835480).

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

1145320 is a wasteful number, since it uses less digits than its factorization.

1145320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1145320 is about 1070.1962436862. The cubic root of 1145320 is about 104.6266407239.

Subtracting from 1145320 its reverse (235411), we obtain a palindrome (909909).

The spelling of 1145320 in words is "one million, one hundred forty-five thousand, three hundred twenty".