1330240 has 28 divisors (see below), whose sum is σ = 3168396. Its totient is φ = 531968.

The previous prime is 1330237. The next prime is 1330249. The reversal of 1330240 is 420331.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 788544 = 736^2 + 888^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1330240.

It is not an unprimeable number, because it can be changed into a prime (1330249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (113157).

2^1330240 is an apocalyptic number.

1330240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1330240 is an abundant number, since it is smaller than the sum of its proper divisors (1838156).

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

1330240 is an equidigital number, since it uses as much as digits as its factorization.

1330240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174 (or 4164 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1330240 is about 1153.3603079697. The cubic root of 1330240 is about 109.9790593747.

Adding to 1330240 its reverse (420331), we get a palindrome (1750571).

Subtracting from 1330240 its reverse (420331), we obtain a palindrome (909909).

The spelling of 1330240 in words is "one million, three hundred thirty thousand, two hundred forty".