4042542 has 32 divisors (see below), whose sum is σ = 9561600. Its totient is φ = 1114848.

The previous prime is 4042523. The next prime is 4042543. The reversal of 4042542 is 2452404.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442 + ... + 2877.

It is an arithmetic number, because the mean of its divisors is an integer number (298800).

Almost surely, 2^4042542 is an apocalyptic number.

4042542 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

4042542 is an abundant number, since it is smaller than the sum of its proper divisors (5519058).

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

4042542 is a wasteful number, since it uses less digits than its factorization.

4042542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4042542 is about 2010.6073709205. The cubic root of 4042542 is about 159.3008819532.

Adding to 4042542 its reverse (2452404), we get a palindrome (6494946).

The spelling of 4042542 in words is "four million, forty-two thousand, five hundred forty-two".