4021452540 has 432 divisors, whose sum is σ = 14789174400. Its totient is φ = 881362944.

The previous prime is 4021452517. The next prime is 4021452557. The reversal of 4021452540 is 452541204.

4021452540 is a `hidden beast` number, since 402 + 1 + 4 + 5 + 254 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 36894006 + ... + 36894114.

It is an arithmetic number, because the mean of its divisors is an integer number (34234200).

Almost surely, 2^4021452540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021452540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7394587200).

4021452540 is an abundant number, since it is smaller than the sum of its proper divisors (10767721860).

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

4021452540 is a wasteful number, since it uses less digits than its factorization.

4021452540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 4021452540 is about 63414.9236378946. The cubic root of 4021452540 is about 1590.2338092147.

Adding to 4021452540 its reverse (452541204), we get a palindrome (4473993744).

The spelling of 4021452540 in words is "four billion, twenty-one million, four hundred fifty-two thousand, five hundred forty".