4542021240 has 128 divisors (see below), whose sum is σ = 14508486720. Its totient is φ = 1133568000.

The previous prime is 4542021233. The next prime is 4542021251. The reversal of 4542021240 is 421202454.

It is a happy number.

It is a super-2 number, since 2×4542021240² = 41259913889222275200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4542021240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363090 + ... + 375390.

Almost surely, 2^4542021240 is an apocalyptic number.

4542021240 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 4542021240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7254243360).

4542021240 is an abundant number, since it is smaller than the sum of its proper divisors (9966465480).

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

4542021240 is a wasteful number, since it uses less digits than its factorization.

4542021240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12513 (or 12509 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 4542021240 is about 67394.5193617404. The cubic root of 4542021240 is about 1656.0866398461.

Adding to 4542021240 its reverse (421202454), we get a palindrome (4963223694).

The spelling of 4542021240 in words is "four billion, five hundred forty-two million, twenty-one thousand, two hundred forty".