7257425321 has 2 divisors, whose sum is σ = 7257425322. Its totient is φ = 7257425320.

The previous prime is 7257425317. The next prime is 7257425393. The reversal of 7257425321 is 1235247527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7255632400 + 1792921 = 85180^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 7257425321 - 2² = 7257425317 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7257422321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3628712660 + 3628712661.

It is an arithmetic number, because the mean of its divisors is an integer number (3628712661).

Almost surely, 2^7257425321 is an apocalyptic number.

It is an amenable number.

7257425321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7257425321 is an equidigital number, since it uses as much as digits as its factorization.

7257425321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 38.

The square root of 7257425321 is about 85190.5236572707. The cubic root of 7257425321 is about 1936.0988420304.

The spelling of 7257425321 in words is "seven billion, two hundred fifty-seven million, four hundred twenty-five thousand, three hundred twenty-one".