1915625 has 12 divisors (see below), whose sum is σ = 2398284. Its totient is φ = 1530000.

The previous prime is 1915619. The next prime is 1915633. The reversal of 1915625 is 5265191.

It can be written as a sum of positive squares in 6 ways, for example, as 1907161 + 8464 = 1381^2 + 92^2 .

It is not a de Polignac number, because 1915625 - 2⁴ = 1915609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2819 + ... + 3431.

It is an arithmetic number, because the mean of its divisors is an integer number (199857).

2^1915625 is an apocalyptic number.

It is an amenable number.

1915625 is a deficient number, since it is larger than the sum of its proper divisors (482659).

1915625 is an frugal number, since it uses more digits than its factorization.

1915625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 618 counting only the distinct ones).

The product of its digits is 2700, while the sum is 29.

The square root of 1915625 is about 1384.0610535666. The cubic root of 1915625 is about 124.1948246776.

The spelling of 1915625 in words is "one million, nine hundred fifteen thousand, six hundred twenty-five".