1920725 has 6 divisors (see below), whose sum is σ = 2381730. Its totient is φ = 1536560.

The previous prime is 1920713. The next prime is 1920731. The reversal of 1920725 is 5270291.

It can be written as a sum of positive squares in 3 ways, for example, as 625681 + 1295044 = 791^2 + 1138^2 .

It is not a de Polignac number, because 1920725 - 2⁸ = 1920469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1920694 and 1920703.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 38390 + ... + 38439.

It is an arithmetic number, because the mean of its divisors is an integer number (396955).

2^1920725 is an apocalyptic number.

It is an amenable number.

1920725 is a deficient number, since it is larger than the sum of its proper divisors (461005).

1920725 is an equidigital number, since it uses as much as digits as its factorization.

1920725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76839 (or 76834 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1920725 is about 1385.9022332041. The cubic root of 1920725 is about 124.3049423220.

The spelling of 1920725 in words is "one million, nine hundred twenty thousand, seven hundred twenty-five".