7125712281 has 24 divisors (see below), whose sum is σ = 10479874080. Its totient is φ = 4664661696.

The previous prime is 7125712273. The next prime is 7125712289. The reversal of 7125712281 is 1822175217.

7125712281 is a `hidden beast` number, since 7 + 1 + 2 + 571 + 2 + 2 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (7125712273) and next prime (7125712289).

It is not a de Polignac number, because 7125712281 - 2³ = 7125712273 is a prime.

It is a super-2 number, since 2×7125712281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7125712289) 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 23 ways as a sum of consecutive naturals, for example, 125250 + ... + 173028.

It is an arithmetic number, because the mean of its divisors is an integer number (436661420).

Almost surely, 2^7125712281 is an apocalyptic number.

It is an amenable number.

7125712281 is a deficient number, since it is larger than the sum of its proper divisors (3354161799).

7125712281 is a wasteful number, since it uses less digits than its factorization.

7125712281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48085 (or 48082 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 7125712281 is about 84413.9341637386. The cubic root of 7125712281 is about 1924.3146854722.

Adding to 7125712281 its reverse (1822175217), we get a palindrome (8947887498).

It can be divided in two parts, 71257 and 12281, that added together give a palindrome (83538).

The spelling of 7125712281 in words is "seven billion, one hundred twenty-five million, seven hundred twelve thousand, two hundred eighty-one".