3871551 has 8 divisors (see below), whose sum is σ = 5174064. Its totient is φ = 2575040.

The previous prime is 3871547. The next prime is 3871579. The reversal of 3871551 is 1551783.

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

It is a cyclic number.

It is not a de Polignac number, because 3871551 - 2² = 3871547 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871501) 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, 325 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (646758).

Almost surely, 2^3871551 is an apocalyptic number.

3871551 is a deficient number, since it is larger than the sum of its proper divisors (1302513).

3871551 is a wasteful number, since it uses less digits than its factorization.

3871551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its digits is 4200, while the sum is 30.

The square root of 3871551 is about 1967.6257266055. The cubic root of 3871551 is about 157.0224182627.

The spelling of 3871551 in words is "three million, eight hundred seventy-one thousand, five hundred fifty-one".