1084509 has 12 divisors (see below), whose sum is σ = 1624896. Its totient is φ = 722844.

The previous prime is 1084493. The next prime is 1084543. The reversal of 1084509 is 9054801.

It is not a de Polignac number, because 1084509 - 2⁴ = 1084493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1989 + ... + 2474.

It is an arithmetic number, because the mean of its divisors is an integer number (135408).

2^1084509 is an apocalyptic number.

It is an amenable number.

1084509 is a deficient number, since it is larger than the sum of its proper divisors (540387).

1084509 is an frugal number, since it uses more digits than its factorization.

1084509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478 (or 4466 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1084509 is about 1041.3976185876. The cubic root of 1084509 is about 102.7411415454.

The spelling of 1084509 in words is "one million, eighty-four thousand, five hundred nine".