1920925 has 6 divisors (see below), whose sum is σ = 2381978. Its totient is φ = 1536720.

The previous prime is 1920923. The next prime is 1920959. The reversal of 1920925 is 5290291.

It can be written as a sum of positive squares in 3 ways, for example, as 101124 + 1819801 = 318^2 + 1349^2 .

It is not a de Polignac number, because 1920925 - 2¹ = 1920923 is a prime.

It is a Duffinian number.

1920925 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1920893 and 1920902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38394 + ... + 38443.

2^1920925 is an apocalyptic number.

It is an amenable number.

1920925 is a deficient number, since it is larger than the sum of its proper divisors (461053).

1920925 is an equidigital number, since it uses as much as digits as its factorization.

1920925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76847 (or 76842 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1920925 is about 1385.9743864877. The cubic root of 1920925 is about 124.3092566869.

The spelling of 1920925 in words is "one million, nine hundred twenty thousand, nine hundred twenty-five".