3721881 has 8 divisors (see below), whose sum is σ = 5006880. Its totient is φ = 2459072.

The previous prime is 3721877. The next prime is 3721901. The reversal of 3721881 is 1881273.

It is a happy number.

3721881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3721881 - 2² = 3721877 is a prime.

It is a super-2 number, since 2×3721881² = 27704796356322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3721811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5151 + ... + 5828.

It is an arithmetic number, because the mean of its divisors is an integer number (625860).

Almost surely, 2^3721881 is an apocalyptic number.

It is an amenable number.

3721881 is a deficient number, since it is larger than the sum of its proper divisors (1284999).

3721881 is a wasteful number, since it uses less digits than its factorization.

3721881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11095.

The product of its digits is 2688, while the sum is 30.

The square root of 3721881 is about 1929.2177171071. The cubic root of 3721881 is about 154.9723294345.

The spelling of 3721881 in words is "three million, seven hundred twenty-one thousand, eight hundred eighty-one".