7516257121 has 2 divisors, whose sum is σ = 7516257122. Its totient is φ = 7516257120.

The previous prime is 7516257097. The next prime is 7516257131. The reversal of 7516257121 is 1217526157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6426266896 + 1089990225 = 80164^2 + 33015^2 .

It is an emirp because it is prime and its reverse (1217526157) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7516257121 - 2⁹ = 7516256609 is a prime.

It is a super-2 number, since 2×7516257121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7516257131) 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 as a sum of consecutive naturals, namely, 3758128560 + 3758128561.

It is an arithmetic number, because the mean of its divisors is an integer number (3758128561).

Almost surely, 2^7516257121 is an apocalyptic number.

It is an amenable number.

7516257121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7516257121 is an equidigital number, since it uses as much as digits as its factorization.

7516257121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 37.

The square root of 7516257121 is about 86696.3501019507. The cubic root of 7516257121 is about 1958.8471216209.

The spelling of 7516257121 in words is "seven billion, five hundred sixteen million, two hundred fifty-seven thousand, one hundred twenty-one".