2105997 has 8 divisors (see below), whose sum is σ = 2827200. Its totient is φ = 1394400.

The previous prime is 2105993. The next prime is 2106019. The reversal of 2105997 is 7995012.

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

It is not a de Polignac number, because 2105997 - 2² = 2105993 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

2105997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872 + ... + 2777.

It is an arithmetic number, because the mean of its divisors is an integer number (353400).

2^2105997 is an apocalyptic number.

It is an amenable number.

2105997 is a deficient number, since it is larger than the sum of its proper divisors (721203).

2105997 is a wasteful number, since it uses less digits than its factorization.

2105997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 2105997 is about 1451.2053610706. The cubic root of 2105997 is about 128.1796995868.

The spelling of 2105997 in words is "two million, one hundred five thousand, nine hundred ninety-seven".