1996121 has 8 divisors (see below), whose sum is σ = 2169600. Its totient is φ = 1829520.

The previous prime is 1996109. The next prime is 1996129. The reversal of 1996121 is 1216991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1996121 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1996129) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1106 + ... + 2283.

It is an arithmetic number, because the mean of its divisors is an integer number (271200).

2^1996121 is an apocalyptic number.

It is an amenable number.

1996121 is a deficient number, since it is larger than the sum of its proper divisors (173479).

1996121 is a wasteful number, since it uses less digits than its factorization.

1996121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439.

The product of its digits is 972, while the sum is 29.

The square root of 1996121 is about 1412.8414631515. The cubic root of 1996121 is about 125.9105983769.

The spelling of 1996121 in words is "one million, nine hundred ninety-six thousand, one hundred twenty-one".