3871905 has 8 divisors (see below), whose sum is σ = 6195072. Its totient is φ = 2065008.

The previous prime is 3871883. The next prime is 3871909. The reversal of 3871905 is 5091783.

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

It is not a de Polignac number, because 3871905 - 2⁶ = 3871841 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 not an unprimeable number, because it can be changed into a prime (3871909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129049 + ... + 129078.

It is an arithmetic number, because the mean of its divisors is an integer number (774384).

Almost surely, 2^3871905 is an apocalyptic number.

It is an amenable number.

3871905 is a deficient number, since it is larger than the sum of its proper divisors (2323167).

3871905 is a wasteful number, since it uses less digits than its factorization.

3871905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258135.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 3871905 is about 1967.7156806815. The cubic root of 3871905 is about 157.0272039625.

The spelling of 3871905 in words is "three million, eight hundred seventy-one thousand, nine hundred five".