2187500 has 48 divisors (see below), whose sum is σ = 5468736. Its totient is φ = 750000.

The previous prime is 2187491. The next prime is 2187511. The reversal of 2187500 is 57812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312497 + ... + 312503.

It is an arithmetic number, because the mean of its divisors is an integer number (113932).

2^2187500 is an apocalyptic number.

2187500 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 2187500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2734368).

2187500 is an abundant number, since it is smaller than the sum of its proper divisors (3281236).

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

2187500 is an frugal number, since it uses more digits than its factorization.

2187500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2187500 is about 1479.0199457749. The cubic root of 2187500 is about 129.8123525463.

Multiplying 2187500 by its product of nonzero digits (560), we get a square (1225000000 = 35000²).

The spelling of 2187500 in words is "two million, one hundred eighty-seven thousand, five hundred".