8742520281 has 16 divisors (see below), whose sum is σ = 12720892608. Its totient is φ = 5296622400.

The previous prime is 8742520261. The next prime is 8742520313. The reversal of 8742520281 is 1820252478.

It is not a de Polignac number, because 8742520281 - 2⁷ = 8742520153 is a prime.

It is a super-2 number, since 2×8742520281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8742520201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50851 + ... + 141671.

It is an arithmetic number, because the mean of its divisors is an integer number (795055788).

Almost surely, 2^8742520281 is an apocalyptic number.

It is an amenable number.

8742520281 is a deficient number, since it is larger than the sum of its proper divisors (3978372327).

8742520281 is a wasteful number, since it uses less digits than its factorization.

8742520281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93752.

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 8742520281 is about 93501.4453417700. The cubic root of 8742520281 is about 2060.0553195469.

The spelling of 8742520281 in words is "eight billion, seven hundred forty-two million, five hundred twenty thousand, two hundred eighty-one".