1425999209 has 2 divisors, whose sum is σ = 1425999210. Its totient is φ = 1425999208.

The previous prime is 1425999199. The next prime is 1425999227. The reversal of 1425999209 is 9029995241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 996349225 + 429649984 = 31565^2 + 20728^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425999209 - 2⁸ = 1425998953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1425999299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712999604 + 712999605.

It is an arithmetic number, because the mean of its divisors is an integer number (712999605).

Almost surely, 2^1425999209 is an apocalyptic number.

It is an amenable number.

1425999209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425999209 is an equidigital number, since it uses as much as digits as its factorization.

1425999209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 1425999209 is about 37762.4047036202. The cubic root of 1425999209 is about 1125.5715177425.

The spelling of 1425999209 in words is "one billion, four hundred twenty-five million, nine hundred ninety-nine thousand, two hundred nine".