1240320 has 144 divisors (see below), whose sum is σ = 4415040. Its totient is φ = 294912.

The previous prime is 1240319. The next prime is 1240333. The reversal of 1240320 is 230421.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1240296 and 1240305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65271 + ... + 65289.

It is an arithmetic number, because the mean of its divisors is an integer number (30660).

2^1240320 is an apocalyptic number.

1240320 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 1240320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207520).

1240320 is an abundant number, since it is smaller than the sum of its proper divisors (3174720).

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

1240320 is a wasteful number, since it uses less digits than its factorization.

1240320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1240320 is about 1113.6965475389. The cubic root of 1240320 is about 107.4429479132.

Adding to 1240320 its reverse (230421), we get a palindrome (1470741).

The spelling of 1240320 in words is "one million, two hundred forty thousand, three hundred twenty".