1404009 has 12 divisors (see below), whose sum is σ = 2056756. Its totient is φ = 922752.

The previous prime is 1403981. The next prime is 1404059. The reversal of 1404009 is 9004041.

It can be written as a sum of positive squares in 2 ways, for example, as 363609 + 1040400 = 603^2 + 1020^2 .

It is not a de Polignac number, because 1404009 - 2¹² = 1399913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1403982 and 1404000.

It is not an unprimeable number, because it can be changed into a prime (1404059) 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 11 ways as a sum of consecutive naturals, for example, 412 + ... + 1725.

2^1404009 is an apocalyptic number.

It is an amenable number.

1404009 is a deficient number, since it is larger than the sum of its proper divisors (652747).

1404009 is a wasteful number, since it uses less digits than its factorization.

1404009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1404009 is about 1184.9088572544. The cubic root of 1404009 is about 111.9755739675.

The spelling of 1404009 in words is "one million, four hundred four thousand, nine".