3942987 has 8 divisors (see below), whose sum is σ = 5293200. Its totient is φ = 2610720.

The previous prime is 3942977. The next prime is 3942989. The reversal of 3942987 is 7892493.

3942987 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 3942987 - 2⁶ = 3942923 is a prime.

3942987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3942989) 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, 3964 + ... + 4857.

It is an arithmetic number, because the mean of its divisors is an integer number (661650).

Almost surely, 2^3942987 is an apocalyptic number.

3942987 is a deficient number, since it is larger than the sum of its proper divisors (1350213).

3942987 is a wasteful number, since it uses less digits than its factorization.

3942987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973.

The product of its digits is 108864, while the sum is 42.

The square root of 3942987 is about 1985.6955960066. The cubic root of 3942987 is about 157.9823058752.

The spelling of 3942987 in words is "three million, nine hundred forty-two thousand, nine hundred eighty-seven".