2166625 has 8 divisors (see below), whose sum is σ = 2704104. Its totient is φ = 1733200.

The previous prime is 2166613. The next prime is 2166629. The reversal of 2166625 is 5266612.

It can be written as a sum of positive squares in 4 ways, for example, as 484416 + 1682209 = 696^2 + 1297^2 .

It is not a de Polignac number, because 2166625 - 2⁹ = 2166113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166593 and 2166602.

It is not an unprimeable number, because it can be changed into a prime (2166629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8542 + ... + 8791.

It is an arithmetic number, because the mean of its divisors is an integer number (338013).

2^2166625 is an apocalyptic number.

2166625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2166625 is a deficient number, since it is larger than the sum of its proper divisors (537479).

2166625 is an equidigital number, since it uses as much as digits as its factorization.

2166625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17348 (or 17338 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 2166625 is about 1471.9459908570. The cubic root of 2166625 is about 129.3981051253.

The spelling of 2166625 in words is "two million, one hundred sixty-six thousand, six hundred twenty-five".