7125281 has 2 divisors, whose sum is σ = 7125282. Its totient is φ = 7125280.

The previous prime is 7125277. The next prime is 7125299. The reversal of 7125281 is 1825217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5837056 + 1288225 = 2416^2 + 1135^2 .

It is an emirp because it is prime and its reverse (1825217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7125281 - 2² = 7125277 is a prime.

It is a super-2 number, since 2×7125281² = 101539258657922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7125281.

It is not a weakly prime, because it can be changed into another prime (7128281) 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 as a sum of consecutive naturals, namely, 3562640 + 3562641.

It is an arithmetic number, because the mean of its divisors is an integer number (3562641).

Almost surely, 2^7125281 is an apocalyptic number.

It is an amenable number.

7125281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7125281 is an equidigital number, since it uses as much as digits as its factorization.

7125281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 7125281 is about 2669.3221986115. The cubic root of 7125281 is about 192.4275861886.

It can be divided in two parts, 71 and 25281, that added together give a palindrome (25352).

The spelling of 7125281 in words is "seven million, one hundred twenty-five thousand, two hundred eighty-one".