1920625 has 20 divisors (see below), whose sum is σ = 2749120. Its totient is φ = 1314000.

The previous prime is 1920617. The next prime is 1920631. The reversal of 1920625 is 5260291.

1920625 = 193² + 194² + ... + 234².

It is not a de Polignac number, because 1920625 - 2³ = 1920617 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1920625.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4156 + ... + 4594.

It is an arithmetic number, because the mean of its divisors is an integer number (137456).

2^1920625 is an apocalyptic number.

It is an amenable number.

1920625 is a deficient number, since it is larger than the sum of its proper divisors (828495).

1920625 is an frugal number, since it uses more digits than its factorization.

1920625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 451 counting only the distinct ones).

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

The square root of 1920625 is about 1385.8661551535. The cubic root of 1920625 is about 124.3027850273.

The spelling of 1920625 in words is "one million, nine hundred twenty thousand, six hundred twenty-five".