1001144 has 16 divisors (see below), whose sum is σ = 1959120. Its totient is φ = 478720.

The previous prime is 1001123. The next prime is 1001153. The reversal of 1001144 is 4411001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2537 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (122445).

2^1001144 is an apocalyptic number.

It is an amenable number.

1001144 is a deficient number, since it is larger than the sum of its proper divisors (957976).

1001144 is a wasteful number, since it uses less digits than its factorization.

1001144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470 (or 5466 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1001144 is about 1000.5718365015. The cubic root of 1001144 is about 100.0381188011.

Adding to 1001144 its reverse (4411001), we get a palindrome (5412145).

The spelling of 1001144 in words is "one million, one thousand, one hundred forty-four".