75112321 has 2 divisors, whose sum is σ = 75112322. Its totient is φ = 75112320.

The previous prime is 75112313. The next prime is 75112327. The reversal of 75112321 is 12321157.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39828721 + 35283600 = 6311^2 + 5940^2 .

It is a cyclic number.

It is not a de Polignac number, because 75112321 - 2³ = 75112313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75112292 and 75112301.

It is not a weakly prime, because it can be changed into another prime (75112327) 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, 37556160 + 37556161.

It is an arithmetic number, because the mean of its divisors is an integer number (37556161).

Almost surely, 2^75112321 is an apocalyptic number.

It is an amenable number.

75112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

75112321 is an equidigital number, since it uses as much as digits as its factorization.

75112321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 22.

The square root of 75112321 is about 8666.7364676676. The cubic root of 75112321 is about 421.9267503119.

Adding to 75112321 its reverse (12321157), we get a palindrome (87433478).

The spelling of 75112321 in words is "seventy-five million, one hundred twelve thousand, three hundred twenty-one".