2190625 has 12 divisors (see below), whose sum is σ = 2742012. Its totient is φ = 1750000.

The previous prime is 2190613. The next prime is 2190647. The reversal of 2190625 is 5260912.

It can be written as a sum of positive squares in 6 ways, for example, as 1423249 + 767376 = 1193^2 + 876^2 .

It is not a de Polignac number, because 2190625 - 2⁵ = 2190593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2190625.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2775 + ... + 3475.

It is an arithmetic number, because the mean of its divisors is an integer number (228501).

2^2190625 is an apocalyptic number.

2190625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2190625 is a deficient number, since it is larger than the sum of its proper divisors (551387).

2190625 is an frugal number, since it uses more digits than its factorization.

2190625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2190625 is about 1480.0760115616. The cubic root of 2190625 is about 129.8741385397.

The spelling of 2190625 in words is "two million, one hundred ninety thousand, six hundred twenty-five".