3621871 has 8 divisors (see below), whose sum is σ = 3999744. Its totient is φ = 3252120.

The previous prime is 3621857. The next prime is 3621881. The reversal of 3621871 is 1781263.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3621871 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 (3621851) 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, 1071 + ... + 2896.

It is an arithmetic number, because the mean of its divisors is an integer number (499968).

Almost surely, 2^3621871 is an apocalyptic number.

3621871 is a deficient number, since it is larger than the sum of its proper divisors (377873).

3621871 is a wasteful number, since it uses less digits than its factorization.

3621871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061.

The product of its digits is 2016, while the sum is 28.

The square root of 3621871 is about 1903.1213834120. The cubic root of 3621871 is about 153.5716295756.

The spelling of 3621871 in words is "three million, six hundred twenty-one thousand, eight hundred seventy-one".