1001323140 has 24 divisors (see below), whose sum is σ = 2803704960. Its totient is φ = 267019488.

The previous prime is 1001323111. The next prime is 1001323163. The reversal of 1001323140 is 413231001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8344300 + ... + 8344419.

It is an arithmetic number, because the mean of its divisors is an integer number (116821040).

Almost surely, 2^1001323140 is an apocalyptic number.

1001323140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001323140 is an abundant number, since it is smaller than the sum of its proper divisors (1802381820).

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

1001323140 is a wasteful number, since it uses less digits than its factorization.

1001323140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16688731 (or 16688729 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1001323140 is about 31643.6903663274. The cubic root of 1001323140 is about 1000.4408522874.

Adding to 1001323140 its reverse (413231001), we get a palindrome (1414554141).

It can be divided in two parts, 10013 and 23140, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 1001323140 in words is "one billion, one million, three hundred twenty-three thousand, one hundred forty".