6425209 has 4 divisors (see below), whose sum is σ = 7343104. Its totient is φ = 5507316.

The previous prime is 6425207. The next prime is 6425213. The reversal of 6425209 is 9025246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6425209 - 2¹ = 6425207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6425207) 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, 458937 + ... + 458950.

It is an arithmetic number, because the mean of its divisors is an integer number (1835776).

Almost surely, 2^6425209 is an apocalyptic number.

It is an amenable number.

6425209 is a deficient number, since it is larger than the sum of its proper divisors (917895).

6425209 is an equidigital number, since it uses as much as digits as its factorization.

6425209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917894.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 6425209 is about 2534.7995976014. The cubic root of 6425209 is about 185.9070044236.

The spelling of 6425209 in words is "six million, four hundred twenty-five thousand, two hundred nine".