4006542 has 16 divisors (see below), whose sum is σ = 8046720. Its totient is φ = 1329912.

The previous prime is 4006537. The next prime is 4006547. The reversal of 4006542 is 2456004.

It is a happy number.

4006542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4006537) and next prime (4006547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006547) 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, 309 + ... + 2847.

It is an arithmetic number, because the mean of its divisors is an integer number (502920).

Almost surely, 2^4006542 is an apocalyptic number.

4006542 is an abundant number, since it is smaller than the sum of its proper divisors (4040178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4006542 is a wasteful number, since it uses less digits than its factorization.

4006542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4006542 is about 2001.6348318312. The cubic root of 4006542 is about 158.8265978750.

The spelling of 4006542 in words is "four million, six thousand, five hundred forty-two".