1425809 has 8 divisors (see below), whose sum is σ = 1777728. Its totient is φ = 1110960.

The previous prime is 1425797. The next prime is 1425811. The reversal of 1425809 is 9085241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1425809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9182 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (222216).

2^1425809 is an apocalyptic number.

It is an amenable number.

1425809 is a deficient number, since it is larger than the sum of its proper divisors (351919).

1425809 is a wasteful number, since it uses less digits than its factorization.

1425809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18535.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1425809 is about 1194.0724433635. The cubic root of 1425809 is about 112.5521470180.

The spelling of 1425809 in words is "one million, four hundred twenty-five thousand, eight hundred nine".