2143040 has 56 divisors (see below), whose sum is σ = 5269992. Its totient is φ = 829440.

The previous prime is 2143039. The next prime is 2143051. The reversal of 2143040 is 403412.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 2050624 = 304^2 + 1432^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11750 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (94107).

2^2143040 is an apocalyptic number.

2143040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2143040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2634996).

2143040 is an abundant number, since it is smaller than the sum of its proper divisors (3126952).

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

2143040 is a wasteful number, since it uses less digits than its factorization.

2143040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2143040 is about 1463.9125656951. The cubic root of 2143040 is about 128.9268659834.

Adding to 2143040 its reverse (403412), we get a palindrome (2546452).

It can be divided in two parts, 21 and 43040, that multiplied together give a triangular number (903840 = T₁₃₄₄).

The spelling of 2143040 in words is "two million, one hundred forty-three thousand, forty".