900505 has 8 divisors (see below), whose sum is σ = 1137600. Its totient is φ = 682416.

The previous prime is 900491. The next prime is 900511. The reversal of 900505 is 505009.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900505 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

900505 is a modest number, since divided by 505 gives 90 as remainder.

900505 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4645 + ... + 4834.

It is an arithmetic number, because the mean of its divisors is an integer number (142200).

2⁹⁰⁰⁵⁰⁵ is an apocalyptic number.

900505 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

900505 is a deficient number, since it is larger than the sum of its proper divisors (237095).

900505 is a wasteful number, since it uses less digits than its factorization.

900505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 900505 is about 948.9494190946. The cubic root of 900505 is about 96.5669933114.

The spelling of 900505 in words is "nine hundred thousand, five hundred five".