1965945 has 8 divisors (see below), whose sum is σ = 3145536. Its totient is φ = 1048496.

The previous prime is 1965941. The next prime is 1965959. The reversal of 1965945 is 5495691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1965945 - 2² = 1965941 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1965941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65517 + ... + 65546.

It is an arithmetic number, because the mean of its divisors is an integer number (393192).

2^1965945 is an apocalyptic number.

1965945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1965945 is a deficient number, since it is larger than the sum of its proper divisors (1179591).

1965945 is a wasteful number, since it uses less digits than its factorization.

1965945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131071.

The product of its digits is 48600, while the sum is 39.

The square root of 1965945 is about 1402.1216067089. The cubic root of 1965945 is about 125.2728971171.

The spelling of 1965945 in words is "one million, nine hundred sixty-five thousand, nine hundred forty-five".