1505009 has 12 divisors (see below), whose sum is σ = 1737360. Its totient is φ = 1292760.

The previous prime is 1505003. The next prime is 1505011. The reversal of 1505009 is 9005051.

It is a de Polignac number, because none of the positive numbers 2^k-1505009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1505003) 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, 3782 + ... + 4160.

It is an arithmetic number, because the mean of its divisors is an integer number (144780).

2^1505009 is an apocalyptic number.

1505009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1505009 is a deficient number, since it is larger than the sum of its proper divisors (232351).

1505009 is a wasteful number, since it uses less digits than its factorization.

1505009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 1505009 is about 1226.7880827592. The cubic root of 1505009 is about 114.5987021002.

The spelling of 1505009 in words is "one million, five hundred five thousand, nine".