2143905 has 16 divisors (see below), whose sum is σ = 3504384. Its totient is φ = 1118720.

The previous prime is 2143901. The next prime is 2143909. The reversal of 2143905 is 5093412.

It is an interprime number because it is at equal distance from previous prime (2143901) and next prime (2143909).

It is not a de Polignac number, because 2143905 - 2² = 2143901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (219024).

2^2143905 is an apocalyptic number.

It is an amenable number.

2143905 is a deficient number, since it is larger than the sum of its proper divisors (1360479).

2143905 is a wasteful number, since it uses less digits than its factorization.

2143905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2143905 is about 1464.2079770306. The cubic root of 2143905 is about 128.9442099959.

The spelling of 2143905 in words is "two million, one hundred forty-three thousand, nine hundred five".