1001321144 has 16 divisors (see below), whose sum is σ = 1903197120. Its totient is φ = 493801920.

The previous prime is 1001321119. The next prime is 1001321149. The reversal of 1001321144 is 4411231001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001321149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 856712 + ... + 857879.

It is an arithmetic number, because the mean of its divisors is an integer number (118949820).

Almost surely, 2^1001321144 is an apocalyptic number.

It is an amenable number.

1001321144 is a deficient number, since it is larger than the sum of its proper divisors (901875976).

1001321144 is a wasteful number, since it uses less digits than its factorization.

1001321144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714670 (or 1714666 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1001321144 is about 31643.6588276388. The cubic root of 1001321144 is about 1000.4401875398.

Adding to 1001321144 its reverse (4411231001), we get a palindrome (5412552145).

The spelling of 1001321144 in words is "one billion, one million, three hundred twenty-one thousand, one hundred forty-four".