4251280820 has 12 divisors (see below), whose sum is σ = 8927689764. Its totient is φ = 1700512320.

The previous prime is 4251280819. The next prime is 4251280823. The reversal of 4251280820 is 280821524.

It can be written as a sum of positive squares in 2 ways, for example, as 3281456656 + 969824164 = 57284^2 + 31142^2 .

It is a super-2 number, since 2×4251280820² = 36146777220999744800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251280823) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 106282001 + ... + 106282040.

It is an arithmetic number, because the mean of its divisors is an integer number (743974147).

Almost surely, 2^4251280820 is an apocalyptic number.

It is an amenable number.

4251280820 is an abundant number, since it is smaller than the sum of its proper divisors (4676408944).

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

4251280820 is a wasteful number, since it uses less digits than its factorization.

4251280820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212564050 (or 212564048 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 4251280820 is about 65201.8467529870. The cubic root of 4251280820 is about 1619.9686042790.

The spelling of 4251280820 in words is "four billion, two hundred fifty-one million, two hundred eighty thousand, eight hundred twenty".