4042123520 has 72 divisors (see below), whose sum is σ = 9841062840. Its totient is φ = 1590312960.

The previous prime is 4042123417. The next prime is 4042123529. The reversal of 4042123520 is 253212404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11397376 + 4030726144 = 3376^2 + 63488^2 .

It is not an unprimeable number, because it can be changed into a prime (4042123529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52196 + ... + 103964.

Almost surely, 2^4042123520 is an apocalyptic number.

4042123520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4042123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4920531420).

4042123520 is an abundant number, since it is smaller than the sum of its proper divisors (5798939320).

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

4042123520 is an equidigital number, since it uses as much as digits as its factorization.

4042123520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51851 (or 51837 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4042123520 is about 63577.6967182675. The cubic root of 4042123520 is about 1592.9538487292.

Adding to 4042123520 its reverse (253212404), we get a palindrome (4295335924).

The spelling of 4042123520 in words is "four billion, forty-two million, one hundred twenty-three thousand, five hundred twenty".