1407809 has 4 divisors (see below), whose sum is σ = 1516116. Its totient is φ = 1299504.

The previous prime is 1407793. The next prime is 1407811. The reversal of 1407809 is 9087041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9087041 = 2027 ⋅4483.

It can be written as a sum of positive squares in 2 ways, for example, as 78400 + 1329409 = 280^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1407809 - 2⁴ = 1407793 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 (1407829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54134 + ... + 54159.

It is an arithmetic number, because the mean of its divisors is an integer number (379029).

2^1407809 is an apocalyptic number.

It is an amenable number.

1407809 is a deficient number, since it is larger than the sum of its proper divisors (108307).

1407809 is a wasteful number, since it uses less digits than its factorization.

1407809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108306.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1407809 is about 1186.5112725971. The cubic root of 1407809 is about 112.0765049145.

The spelling of 1407809 in words is "one million, four hundred seven thousand, eight hundred nine".