6425409 has 4 divisors (see below), whose sum is σ = 8567216. Its totient is φ = 4283604.

The previous prime is 6425389. The next prime is 6425411. The reversal of 6425409 is 9045246.

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 not a de Polignac number, because 6425409 - 2⁹ = 6424897 is a prime.

It is a D-number.

It is a Duffinian 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, 1070899 + ... + 1070904.

It is an arithmetic number, because the mean of its divisors is an integer number (2141804).

Almost surely, 2^6425409 is an apocalyptic number.

It is an amenable number.

6425409 is a deficient number, since it is larger than the sum of its proper divisors (2141807).

6425409 is a wasteful number, since it uses less digits than its factorization.

6425409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141806.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6425409 is about 2534.8390481449. The cubic root of 6425409 is about 185.9089333370.

The spelling of 6425409 in words is "six million, four hundred twenty-five thousand, four hundred nine".