425422009 has 4 divisors (see below), whose sum is σ = 425497716. Its totient is φ = 425346304.

The previous prime is 425421977. The next prime is 425422069. The reversal of 425422009 is 900224524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122766400 + 302655609 = 11080^2 + 17397^2 .

It is a cyclic number.

It is not a de Polignac number, because 425422009 - 2⁵ = 425421977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425422069) 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 in 3 ways as a sum of consecutive naturals, for example, 28684 + ... + 40909.

It is an arithmetic number, because the mean of its divisors is an integer number (106374429).

Almost surely, 2^425422009 is an apocalyptic number.

It is an amenable number.

425422009 is a deficient number, since it is larger than the sum of its proper divisors (75707).

425422009 is an equidigital number, since it uses as much as digits as its factorization.

425422009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75706.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 425422009 is about 20625.7608102101. The cubic root of 425422009 is about 752.0960678017.

It can be divided in two parts, 42542 and 2009, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 425422009 in words is "four hundred twenty-five million, four hundred twenty-two thousand, nine".