3871405 has 8 divisors (see below), whose sum is σ = 4656384. Its totient is φ = 3090000.

The previous prime is 3871397. The next prime is 3871423. The reversal of 3871405 is 5041783.

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

It is not a de Polignac number, because 3871405 - 2³ = 3871397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3240 + ... + 4270.

It is an arithmetic number, because the mean of its divisors is an integer number (582048).

Almost surely, 2^3871405 is an apocalyptic number.

It is an amenable number.

3871405 is a deficient number, since it is larger than the sum of its proper divisors (784979).

3871405 is a wasteful number, since it uses less digits than its factorization.

3871405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 3871405 is about 1967.5886257041. The cubic root of 3871405 is about 157.0204444146.

The spelling of 3871405 in words is "three million, eight hundred seventy-one thousand, four hundred five".