1001321260 has 24 divisors (see below), whose sum is σ = 2111510016. Its totient is φ = 398864640.

The previous prime is 1001321257. The next prime is 1001321281. The reversal of 1001321260 is 621231001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99052 + ... + 108691.

It is an arithmetic number, because the mean of its divisors is an integer number (87979584).

Almost surely, 2^1001321260 is an apocalyptic number.

1001321260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001321260 is an abundant number, since it is smaller than the sum of its proper divisors (1110188756).

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

1001321260 is a wasteful number, since it uses less digits than its factorization.

1001321260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207993 (or 207991 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1001321260 is about 31643.6606605494. The cubic root of 1001321260 is about 1000.4402261725.

Adding to 1001321260 its reverse (621231001), we get a palindrome (1622552261).

The spelling of 1001321260 in words is "one billion, one million, three hundred twenty-one thousand, two hundred sixty".