1231360 has 80 divisors (see below), whose sum is σ = 3265416. Its totient is φ = 442368.

The previous prime is 1231357. The next prime is 1231379. The reversal of 1231360 is 631321.

It can be written as a sum of positive squares in 4 ways, for example, as 1016064 + 215296 = 1008^2 + 464^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33262 + ... + 33298.

2^1231360 is an apocalyptic number.

1231360 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 1231360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632708).

1231360 is an abundant number, since it is smaller than the sum of its proper divisors (2034056).

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

1231360 is an equidigital number, since it uses as much as digits as its factorization.

1231360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231360 is about 1109.6666166016. Note that the first 4 decimals coincide. The cubic root of 1231360 is about 107.1836018580.

Adding to 1231360 its reverse (631321), we get a palindrome (1862681).

It can be divided in two parts, 1 and 231360, that added together give a square (231361 = 481²).

The spelling of 1231360 in words is "one million, two hundred thirty-one thousand, three hundred sixty".