3981755 has 8 divisors (see below), whose sum is σ = 4907472. Its totient is φ = 3099168.

The previous prime is 3981749. The next prime is 3981763. The reversal of 3981755 is 5571893.

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 3981755 - 2⁴ = 3981739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10577 + ... + 10946.

It is an arithmetic number, because the mean of its divisors is an integer number (613434).

Almost surely, 2^3981755 is an apocalyptic number.

3981755 is a deficient number, since it is larger than the sum of its proper divisors (925717).

3981755 is a wasteful number, since it uses less digits than its factorization.

3981755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21565.

The product of its digits is 37800, while the sum is 38.

The square root of 3981755 is about 1995.4335368536. The cubic root of 3981755 is about 158.4983862083.

The spelling of 3981755 in words is "three million, nine hundred eighty-one thousand, seven hundred fifty-five".