1313440 has 24 divisors (see below), whose sum is σ = 3103380. Its totient is φ = 525312.

The previous prime is 1313423. The next prime is 1313443. The reversal of 1313440 is 443131.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 138384 = 1084^2 + 372^2 .

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

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1313443) 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, 3945 + ... + 4264.

2^1313440 is an apocalyptic number.

1313440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313440 is an abundant number, since it is smaller than the sum of its proper divisors (1789940).

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

1313440 is an equidigital number, since it uses as much as digits as its factorization.

1313440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224 (or 8216 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1313440 is about 1146.0540999447. The cubic root of 1313440 is about 109.5141103422.

Adding to 1313440 its reverse (443131), we get a palindrome (1756571).

The spelling of 1313440 in words is "one million, three hundred thirteen thousand, four hundred forty".