2143280 has 40 divisors (see below), whose sum is σ = 5065152. Its totient is φ = 843264.

The previous prime is 2143279. The next prime is 2143313. The reversal of 2143280 is 823412.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 5657 + ... + 6023.

2^2143280 is an apocalyptic number.

2143280 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 2143280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2532576).

2143280 is an abundant number, since it is smaller than the sum of its proper divisors (2921872).

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

2143280 is a wasteful number, since it uses less digits than its factorization.

2143280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2143280 is about 1463.9945355089. The cubic root of 2143280 is about 128.9316786627.

Adding to 2143280 its reverse (823412), we get a palindrome (2966692).

It can be divided in two parts, 21432 and 80, that added together give a palindrome (21512).

The spelling of 2143280 in words is "two million, one hundred forty-three thousand, two hundred eighty".