3942881 has 4 divisors (see below), whose sum is σ = 3951792. Its totient is φ = 3933972.

The previous prime is 3942871. The next prime is 3942889. The reversal of 3942881 is 1882493.

It is a happy number.

3942881 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, and also an emirpimes, since its reverse is a distinct semiprime: 1882493 = 379 ⋅4967.

It is a cyclic number.

It is not a de Polignac number, because 3942881 - 2¹⁴ = 3926497 is a prime.

It is a super-2 number, since 2×3942881² = 31092621160322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3942889) 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, 3755 + ... + 4688.

It is an arithmetic number, because the mean of its divisors is an integer number (987948).

Almost surely, 2^3942881 is an apocalyptic number.

It is an amenable number.

3942881 is a deficient number, since it is larger than the sum of its proper divisors (8911).

3942881 is an equidigital number, since it uses as much as digits as its factorization.

3942881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910.

The product of its digits is 13824, while the sum is 35.

The square root of 3942881 is about 1985.6689049285. The cubic root of 3942881 is about 157.9808901740.

The spelling of 3942881 in words is "three million, nine hundred forty-two thousand, eight hundred eighty-one".