1920965 has 4 divisors (see below), whose sum is σ = 2305164. Its totient is φ = 1536768.

The previous prime is 1920959. The next prime is 1920991. The reversal of 1920965 is 5690291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 368449 + 1552516 = 607^2 + 1246^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920965 - 2⁶ = 1920901 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 192092 + ... + 192101.

It is an arithmetic number, because the mean of its divisors is an integer number (576291).

2^1920965 is an apocalyptic number.

It is an amenable number.

1920965 is a deficient number, since it is larger than the sum of its proper divisors (384199).

1920965 is an equidigital number, since it uses as much as digits as its factorization.

1920965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384198.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1920965 is about 1385.9888166937. The cubic root of 1920965 is about 124.3101195240.

The spelling of 1920965 in words is "one million, nine hundred twenty thousand, nine hundred sixty-five".