4857072921 has 12 divisors (see below), whose sum is σ = 7016585940. Its totient is φ = 3237672960.

The previous prime is 4857072911. The next prime is 4857072929. The reversal of 4857072921 is 1292707584.

It is a happy number.

4857072921 is a `hidden beast` number, since 4 + 8 + 570 + 72 + 9 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2402960400 + 2454112521 = 49020^2 + 49539^2 .

It is not a de Polignac number, because 4857072921 - 2¹⁷ = 4856941849 is a prime.

It is a super-2 number, since 2×4857072921² = 47182314719822944482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4857072929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66745 + ... + 119033.

It is an arithmetic number, because the mean of its divisors is an integer number (584715495).

Almost surely, 2^4857072921 is an apocalyptic number.

It is an amenable number.

4857072921 is a deficient number, since it is larger than the sum of its proper divisors (2159513019).

4857072921 is a wasteful number, since it uses less digits than its factorization.

4857072921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62616 (or 62613 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 4857072921 is about 69692.7034990034. The cubic root of 4857072921 is about 1693.5247235940.

The spelling of 4857072921 in words is "four billion, eight hundred fifty-seven million, seventy-two thousand, nine hundred twenty-one".