6425009 has 4 divisors (see below), whose sum is σ = 6432804. Its totient is φ = 6417216.

The previous prime is 6424993. The next prime is 6425011. The reversal of 6425009 is 9005246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9005246 = 2 ⋅4502623.

It can be written as a sum of positive squares in 2 ways, for example, as 160000 + 6265009 = 400^2 + 2503^2 .

It is a cyclic number.

It is not a de Polignac number, because 6425009 - 2⁴ = 6424993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492 + ... + 4365.

It is an arithmetic number, because the mean of its divisors is an integer number (1608201).

Almost surely, 2^6425009 is an apocalyptic number.

It is an amenable number.

6425009 is a deficient number, since it is larger than the sum of its proper divisors (7795).

6425009 is an equidigital number, since it uses as much as digits as its factorization.

6425009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7794.

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

The square root of 6425009 is about 2534.7601464438. The cubic root of 6425009 is about 185.9050754702.

The spelling of 6425009 in words is "six million, four hundred twenty-five thousand, nine".