2143500 has 48 divisors (see below), whose sum is σ = 6246240. Its totient is φ = 571200.

The previous prime is 2143489. The next prime is 2143501. The reversal of 2143500 is 53412.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2143500.

It is not an unprimeable number, because it can be changed into a prime (2143501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786 + ... + 2214.

It is an arithmetic number, because the mean of its divisors is an integer number (130130).

2^2143500 is an apocalyptic number.

2143500 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 2143500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3123120).

2143500 is an abundant number, since it is smaller than the sum of its proper divisors (4102740).

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

2143500 is a wasteful number, since it uses less digits than its factorization.

2143500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2143500 is about 1464.0696704734. The cubic root of 2143500 is about 128.9360899698.

Subtracting from 2143500 its sum of digits (15), we obtain a triangular number (2143485 = T₂₀₇₀).

Adding to 2143500 its reverse (53412), we get a palindrome (2196912).

The spelling of 2143500 in words is "two million, one hundred forty-three thousand, five hundred".