1404209 has 8 divisors (see below), whose sum is σ = 1489320. Its totient is φ = 1321600.

The previous prime is 1404191. The next prime is 1404211. The reversal of 1404209 is 9024041.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 1221025 = 428^2 + 1105^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1404209 - 2⁸ = 1403953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1404229) 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 7 ways as a sum of consecutive naturals, for example, 599 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (186165).

2^1404209 is an apocalyptic number.

It is an amenable number.

1404209 is a deficient number, since it is larger than the sum of its proper divisors (85111).

1404209 is a wasteful number, since it uses less digits than its factorization.

1404209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1404209 is about 1184.9932489259. The cubic root of 1404209 is about 111.9808906598.

The spelling of 1404209 in words is "one million, four hundred four thousand, two hundred nine".