394225001 has 2 divisors, whose sum is σ = 394225002. Its totient is φ = 394225000.

The previous prime is 394224997. The next prime is 394225031. The reversal of 394225001 is 100522493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377291776 + 16933225 = 19424^2 + 4115^2 .

It is an emirp because it is prime and its reverse (100522493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394225001 - 2² = 394224997 is a prime.

It is not a weakly prime, because it can be changed into another prime (394225031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197112500 + 197112501.

It is an arithmetic number, because the mean of its divisors is an integer number (197112501).

Almost surely, 2^394225001 is an apocalyptic number.

It is an amenable number.

394225001 is a deficient number, since it is larger than the sum of its proper divisors (1).

394225001 is an equidigital number, since it uses as much as digits as its factorization.

394225001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 394225001 is about 19855.1001256604. The cubic root of 394225001 is about 733.2432172782.

Adding to 394225001 its reverse (100522493), we get a palindrome (494747494).

The spelling of 394225001 in words is "three hundred ninety-four million, two hundred twenty-five thousand, one".