2001144 has 32 divisors (see below), whose sum is σ = 5040000. Its totient is φ = 662112.

The previous prime is 2001127. The next prime is 2001163. The reversal of 2001144 is 4411002.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 7 ways as a sum of consecutive naturals, for example, 4567 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^2001144 is an apocalyptic number.

2001144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2001144 is an abundant number, since it is smaller than the sum of its proper divisors (3038856).

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

2001144 is a wasteful number, since it uses less digits than its factorization.

2001144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2001144 is about 1414.6179696300. The cubic root of 2001144 is about 126.0161229053.

Adding to 2001144 its reverse (4411002), we get a palindrome (6412146).

It can be divided in two parts, 2001 and 144, that added together give a triangular number (2145 = T₆₅).

The spelling of 2001144 in words is "two million, one thousand, one hundred forty-four".