1890625 has 21 divisors (see below), whose sum is σ = 2597623. Its totient is φ = 1375000.

The previous prime is 1890617. The next prime is 1890631. The reversal of 1890625 is 5260981.

The square root of 1890625 is 1375.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 1656369 + 234256 = 1287^2 + 484^2 .

It is not a de Polignac number, because 1890625 - 2³ = 1890617 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 171870 + ... + 171880.

2^1890625 is an apocalyptic number.

1890625 is the 1375-th square number.

1890625 is the 688-th centered octagonal number.

It is an amenable number.

1890625 is a deficient number, since it is larger than the sum of its proper divisors (706998).

1890625 is an frugal number, since it uses more digits than its factorization.

1890625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The cubic root of 1890625 is about 123.6521860812.

The spelling of 1890625 in words is "one million, eight hundred ninety thousand, six hundred twenty-five".