3959945 has 8 divisors (see below), whose sum is σ = 5184000. Its totient is φ = 2879920.

The previous prime is 3959911. The next prime is 3959947. The reversal of 3959945 is 5499593.

3959945 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 not a de Polignac number, because 3959945 - 2¹⁶ = 3894409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3959896 and 3959905.

It is not an unprimeable number, because it can be changed into a prime (3959947) 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, 35945 + ... + 36054.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^3959945 is an apocalyptic number.

It is an amenable number.

3959945 is a deficient number, since it is larger than the sum of its proper divisors (1224055).

3959945 is a wasteful number, since it uses less digits than its factorization.

3959945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72015.

The product of its digits is 218700, while the sum is 44.

The square root of 3959945 is about 1989.9610548953. The cubic root of 3959945 is about 158.2084654159.

The spelling of 3959945 in words is "three million, nine hundred fifty-nine thousand, nine hundred forty-five".