1996161 has 4 divisors (see below), whose sum is σ = 2661552. Its totient is φ = 1330772.

The previous prime is 1996129. The next prime is 1996171. The reversal of 1996161 is 1616991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1996161 - 2⁵ = 1996129 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1996171) 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 3 ways as a sum of consecutive naturals, for example, 332691 + ... + 332696.

It is an arithmetic number, because the mean of its divisors is an integer number (665388).

2^1996161 is an apocalyptic number.

It is an amenable number.

1996161 is a deficient number, since it is larger than the sum of its proper divisors (665391).

1996161 is an equidigital number, since it uses as much as digits as its factorization.

1996161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665390.

The product of its digits is 2916, while the sum is 33.

The square root of 1996161 is about 1412.8556189505. The cubic root of 1996161 is about 125.9114394064.

The spelling of 1996161 in words is "one million, nine hundred ninety-six thousand, one hundred sixty-one".