1530905 has 12 divisors (see below), whose sum is σ = 1889580. Its totient is φ = 1190592.

The previous prime is 1530871. The next prime is 1530911. The reversal of 1530905 is 5090351.

It can be written as a sum of positive squares in 6 ways, for example, as 100489 + 1430416 = 317^2 + 1196^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1530905 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

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, 13991 + ... + 14099.

It is an arithmetic number, because the mean of its divisors is an integer number (157465).

2^1530905 is an apocalyptic number.

It is an amenable number.

1530905 is a deficient number, since it is larger than the sum of its proper divisors (358675).

1530905 is an equidigital number, since it uses as much as digits as its factorization.

1530905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 1530905 is about 1237.2974581724. The cubic root of 1530905 is about 115.2522503219.

The spelling of 1530905 in words is "one million, five hundred thirty thousand, nine hundred five".