1920225 has 12 divisors (see below), whose sum is σ = 3174896. Its totient is φ = 1024080.

The previous prime is 1920223. The next prime is 1920227. The reversal of 1920225 is 5220291.

It is an interprime number because it is at equal distance from previous prime (1920223) and next prime (1920227).

It is not a de Polignac number, because 1920225 - 2¹ = 1920223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12727 + ... + 12876.

2^1920225 is an apocalyptic number.

1920225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1920225 is a deficient number, since it is larger than the sum of its proper divisors (1254671).

1920225 is a wasteful number, since it uses less digits than its factorization.

1920225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25616 (or 25611 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1920225 is about 1385.7218335582. The cubic root of 1920225 is about 124.2941550993.

It can be divided in two parts, 1920 and 225, that added together give a triangular number (2145 = T₆₅).

The spelling of 1920225 in words is "one million, nine hundred twenty thousand, two hundred twenty-five".