3720881 has 4 divisors (see below), whose sum is σ = 3731952. Its totient is φ = 3709812.

The previous prime is 3720877. The next prime is 3720887. The reversal of 3720881 is 1880273.

3720881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3720881 - 2² = 3720877 is a prime.

It is a super-2 number, since 2×3720881² = 27689910832322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3720887) 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 3 ways as a sum of consecutive naturals, for example, 5015 + ... + 5708.

It is an arithmetic number, because the mean of its divisors is an integer number (932988).

Almost surely, 2^3720881 is an apocalyptic number.

It is an amenable number.

3720881 is a deficient number, since it is larger than the sum of its proper divisors (11071).

3720881 is a wasteful number, since it uses less digits than its factorization.

3720881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 3720881 is about 1928.9585272888. The cubic root of 3720881 is about 154.9584487998.

The spelling of 3720881 in words is "three million, seven hundred twenty thousand, eight hundred eighty-one".