1404309 has 16 divisors (see below), whose sum is σ = 2004480. Its totient is φ = 871920.

The previous prime is 1404289. The next prime is 1404323. The reversal of 1404309 is 9034041.

1404309 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 1404309 - 2⁷ = 1404181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3874 + ... + 4220.

It is an arithmetic number, because the mean of its divisors is an integer number (125280).

2^1404309 is an apocalyptic number.

1404309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1404309 is a deficient number, since it is larger than the sum of its proper divisors (600171).

1404309 is a wasteful number, since it uses less digits than its factorization.

1404309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1404309 is about 1185.0354425079. The cubic root of 1404309 is about 111.9835488167.

The spelling of 1404309 in words is "one million, four hundred four thousand, three hundred nine".