1325031440 has 120 divisors (see below), whose sum is σ = 3230418240. Its totient is φ = 505277440.

The previous prime is 1325031437. The next prime is 1325031451. The reversal of 1325031440 is 441305231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7934237 + ... + 7934403.

It is an arithmetic number, because the mean of its divisors is an integer number (26920152).

Almost surely, 2^1325031440 is an apocalyptic number.

1325031440 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 1325031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615209120).

1325031440 is an abundant number, since it is smaller than the sum of its proper divisors (1905386800).

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

1325031440 is a wasteful number, since it uses less digits than its factorization.

1325031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1325031440 is about 36400.9813054538. The cubic root of 1325031440 is about 1098.3533047294.

Adding to 1325031440 its reverse (441305231), we get a palindrome (1766336671).

The spelling of 1325031440 in words is "one billion, three hundred twenty-five million, thirty-one thousand, four hundred forty".