1965939 has 16 divisors (see below), whose sum is σ = 2764800. Its totient is φ = 1240736.

The previous prime is 1965937. The next prime is 1965941. The reversal of 1965939 is 9395691.

1965939 = 66² + 67² + ... + 183².

It is an interprime number because it is at equal distance from previous prime (1965937) and next prime (1965941).

It is not a de Polignac number, because 1965939 - 2¹ = 1965937 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1965939.

It is not an unprimeable number, because it can be changed into a prime (1965937) 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 15 ways as a sum of consecutive naturals, for example, 4942 + ... + 5324.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

2^1965939 is an apocalyptic number.

1965939 is a deficient number, since it is larger than the sum of its proper divisors (798861).

1965939 is a wasteful number, since it uses less digits than its factorization.

1965939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474.

The product of its digits is 65610, while the sum is 42.

The square root of 1965939 is about 1402.1194670926. The cubic root of 1965939 is about 125.2727696740.

The spelling of 1965939 in words is "one million, nine hundred sixty-five thousand, nine hundred thirty-nine".