1201320 has 96 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 309120.

The previous prime is 1201309. The next prime is 1201327. The reversal of 1201320 is 231021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

1201320 is a modest number, since divided by 1320 gives 120 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1201327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16885 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2^1201320 is an apocalyptic number.

1201320 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 1201320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021760).

1201320 is an abundant number, since it is smaller than the sum of its proper divisors (2842200).

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

1201320 is a wasteful number, since it uses less digits than its factorization.

1201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1201320 is about 1096.0474442286. The cubic root of 1201320 is about 106.3048067877.

Adding to 1201320 its reverse (231021), we get a palindrome (1432341).

Subtracting from 1201320 its reverse (231021), we obtain a cube (970299 = 99³).

It can be divided in two parts, 1201 and 320, that added together give a square (1521 = 39²).

The spelling of 1201320 in words is "one million, two hundred one thousand, three hundred twenty".