395625521 has 2 divisors, whose sum is σ = 395625522. Its totient is φ = 395625520.

The previous prime is 395625493. The next prime is 395625533. The reversal of 395625521 is 125526593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287777296 + 107848225 = 16964^2 + 10385^2 .

It is a cyclic number.

It is not a de Polignac number, because 395625521 - 2¹⁸ = 395363377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (395625541) 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, 197812760 + 197812761.

It is an arithmetic number, because the mean of its divisors is an integer number (197812761).

Almost surely, 2^395625521 is an apocalyptic number.

It is an amenable number.

395625521 is a deficient number, since it is larger than the sum of its proper divisors (1).

395625521 is an equidigital number, since it uses as much as digits as its factorization.

395625521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 38.

The square root of 395625521 is about 19890.3373777319. The cubic root of 395625521 is about 734.1104953596.

The spelling of 395625521 in words is "three hundred ninety-five million, six hundred twenty-five thousand, five hundred twenty-one".