1345509 has 12 divisors (see below), whose sum is σ = 2120352. Its totient is φ = 815400.

The previous prime is 1345507. The next prime is 1345537. The reversal of 1345509 is 9055431.

It is not a de Polignac number, because 1345509 - 2¹ = 1345507 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345507) 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, 6697 + ... + 6894.

It is an arithmetic number, because the mean of its divisors is an integer number (176696).

2^1345509 is an apocalyptic number.

It is an amenable number.

1345509 is a deficient number, since it is larger than the sum of its proper divisors (774843).

1345509 is a wasteful number, since it uses less digits than its factorization.

1345509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608 (or 13605 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1345509 is about 1159.9607751989. The cubic root of 1345509 is about 110.3982533593.

The spelling of 1345509 in words is "one million, three hundred forty-five thousand, five hundred nine".