3999142 has 16 divisors (see below), whose sum is σ = 6884352. Its totient is φ = 1706760.

The previous prime is 3999113. The next prime is 3999143. The reversal of 3999142 is 2419993.

3999142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999143) 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, 4203 + ... + 5065.

It is an arithmetic number, because the mean of its divisors is an integer number (430272).

Almost surely, 2^3999142 is an apocalyptic number.

3999142 is a deficient number, since it is larger than the sum of its proper divisors (2885210).

3999142 is a wasteful number, since it uses less digits than its factorization.

3999142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203.

The product of its digits is 17496, while the sum is 37.

The square root of 3999142 is about 1999.7854884962. The cubic root of 3999142 is about 158.7287544677.

The spelling of 3999142 in words is "three million, nine hundred ninety-nine thousand, one hundred forty-two".