675257521 has 2 divisors, whose sum is σ = 675257522. Its totient is φ = 675257520.

The previous prime is 675257441. The next prime is 675257573. The reversal of 675257521 is 125752576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623201296 + 52056225 = 24964^2 + 7215^2 .

It is a cyclic number.

It is not a de Polignac number, because 675257521 - 2¹¹ = 675255473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (675257591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337628760 + 337628761.

It is an arithmetic number, because the mean of its divisors is an integer number (337628761).

Almost surely, 2^675257521 is an apocalyptic number.

It is an amenable number.

675257521 is a deficient number, since it is larger than the sum of its proper divisors (1).

675257521 is an equidigital number, since it uses as much as digits as its factorization.

675257521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147000, while the sum is 40.

The square root of 675257521 is about 25985.7176348855. The cubic root of 675257521 is about 877.3168622391.

The spelling of 675257521 in words is "six hundred seventy-five million, two hundred fifty-seven thousand, five hundred twenty-one".