2187725 has 6 divisors (see below), whose sum is σ = 2712810. Its totient is φ = 1750160.

The previous prime is 2187707. The next prime is 2187727. The reversal of 2187725 is 5277812.

It can be written as a sum of positive squares in 3 ways, for example, as 635209 + 1552516 = 797^2 + 1246^2 .

It is not a de Polignac number, because 2187725 - 2¹⁴ = 2171341 is a prime.

It is a super-2 number, since 2×2187725² = 9572281351250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2187691 and 2187700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43730 + ... + 43779.

It is an arithmetic number, because the mean of its divisors is an integer number (452135).

2^2187725 is an apocalyptic number.

2187725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2187725 is a deficient number, since it is larger than the sum of its proper divisors (525085).

2187725 is an equidigital number, since it uses as much as digits as its factorization.

2187725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87519 (or 87514 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 2187725 is about 1479.0960077020. The cubic root of 2187725 is about 129.8168031029.

The spelling of 2187725 in words is "two million, one hundred eighty-seven thousand, seven hundred twenty-five".