395252521 has 2 divisors, whose sum is σ = 395252522. Its totient is φ = 395252520.

The previous prime is 395252519. The next prime is 395252531. The reversal of 395252521 is 125252593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237498921 + 157753600 = 15411^2 + 12560^2 .

It is a cyclic number.

It is not a de Polignac number, because 395252521 - 2¹ = 395252519 is a prime.

Together with 395252519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (395252531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197626260 + 197626261.

It is an arithmetic number, because the mean of its divisors is an integer number (197626261).

Almost surely, 2^395252521 is an apocalyptic number.

It is an amenable number.

395252521 is a deficient number, since it is larger than the sum of its proper divisors (1).

395252521 is an equidigital number, since it uses as much as digits as its factorization.

395252521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 395252521 is about 19880.9587545470. The cubic root of 395252521 is about 733.8797137241.

The spelling of 395252521 in words is "three hundred ninety-five million, two hundred fifty-two thousand, five hundred twenty-one".