2105901 has 12 divisors (see below), whose sum is σ = 3476512. Its totient is φ = 1203336.

The previous prime is 2105897. The next prime is 2105911. The reversal of 2105901 is 1095012.

It is not a de Polignac number, because 2105901 - 2² = 2105897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105911) 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 11 ways as a sum of consecutive naturals, for example, 16651 + ... + 16776.

2^2105901 is an apocalyptic number.

2105901 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2105901 is a deficient number, since it is larger than the sum of its proper divisors (1370611).

2105901 is a wasteful number, since it uses less digits than its factorization.

2105901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33440 (or 33437 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2105901 is about 1451.1722847409. The cubic root of 2105901 is about 128.1777519047.

The spelling of 2105901 in words is "two million, one hundred five thousand, nine hundred one".