2001504 has 24 divisors (see below), whose sum is σ = 5254200. Its totient is φ = 667136.

The previous prime is 2001487. The next prime is 2001509. The reversal of 2001504 is 4051002.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a self number, because there is not a number n which added to its sum of digits gives 2001504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10329 + ... + 10520.

It is an arithmetic number, because the mean of its divisors is an integer number (218925).

2^2001504 is an apocalyptic number.

2001504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2001504 is an abundant number, since it is smaller than the sum of its proper divisors (3252696).

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

2001504 is a wasteful number, since it uses less digits than its factorization.

2001504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20862 (or 20854 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2001504 is about 1414.7452067422. The cubic root of 2001504 is about 126.0236790972.

Adding to 2001504 its reverse (4051002), we get a palindrome (6052506).

The spelling of 2001504 in words is "two million, one thousand, five hundred four".