7120841281 has 4 divisors (see below), whose sum is σ = 7129151172. Its totient is φ = 7112531392.

The previous prime is 7120841263. The next prime is 7120841297. The reversal of 7120841281 is 1821480217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1821480217 = 1877 ⋅970421.

It can be written as a sum of positive squares in 2 ways, for example, as 5473780225 + 1647061056 = 73985^2 + 40584^2 .

It is a cyclic number.

It is not a de Polignac number, because 7120841281 - 2²⁵ = 7087286849 is a prime.

It is a super-2 number, since 2×7120841281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7120841201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4153660 + ... + 4155373.

It is an arithmetic number, because the mean of its divisors is an integer number (1782287793).

Almost surely, 2^7120841281 is an apocalyptic number.

It is an amenable number.

7120841281 is a deficient number, since it is larger than the sum of its proper divisors (8309891).

7120841281 is an equidigital number, since it uses as much as digits as its factorization.

7120841281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8309890.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 7120841281 is about 84385.0773596849. The cubic root of 7120841281 is about 1923.8761106750.

The spelling of 7120841281 in words is "seven billion, one hundred twenty million, eight hundred forty-one thousand, two hundred eighty-one".