1001325440 has 32 divisors (see below), whose sum is σ = 2393795160. Its totient is φ = 400529920.

The previous prime is 1001325421. The next prime is 1001325461. The reversal of 1001325440 is 445231001.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781646 + ... + 782925.

Almost surely, 2^1001325440 is an apocalyptic number.

1001325440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001325440 is an abundant number, since it is smaller than the sum of its proper divisors (1392469720).

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

1001325440 is an equidigital number, since it uses as much as digits as its factorization.

1001325440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564590 (or 1564578 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1001325440 is about 31643.7267084647. The cubic root of 1001325440 is about 1000.4416182779.

Adding to 1001325440 its reverse (445231001), we get a palindrome (1446556441).

It can be divided in two parts, 10013 and 25440, that added together give a palindrome (35453).

The spelling of 1001325440 in words is "one billion, one million, three hundred twenty-five thousand, four hundred forty".