75081121 has 2 divisors, whose sum is σ = 75081122. Its totient is φ = 75081120.

The previous prime is 75081119. The next prime is 75081161. The reversal of 75081121 is 12118057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48455521 + 26625600 = 6961^2 + 5160^2 .

It is a cyclic number.

It is not a de Polignac number, because 75081121 - 2¹ = 75081119 is a prime.

Together with 75081119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75081161) 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, 37540560 + 37540561.

It is an arithmetic number, because the mean of its divisors is an integer number (37540561).

Almost surely, 2^75081121 is an apocalyptic number.

It is an amenable number.

75081121 is a deficient number, since it is larger than the sum of its proper divisors (1).

75081121 is an equidigital number, since it uses as much as digits as its factorization.

75081121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 75081121 is about 8664.9362952073. The cubic root of 75081121 is about 421.8683225354.

Adding to 75081121 its reverse (12118057), we get a palindrome (87199178).

The spelling of 75081121 in words is "seventy-five million, eighty-one thousand, one hundred twenty-one".