1305011505 has 16 divisors (see below), whose sum is σ = 2386306944. Its totient is φ = 596576640.

The previous prime is 1305011471. The next prime is 1305011531. The reversal of 1305011505 is 5051105031.

It is not a de Polignac number, because 1305011505 - 2⁸ = 1305011249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6214236 + ... + 6214445.

It is an arithmetic number, because the mean of its divisors is an integer number (149144184).

Almost surely, 2^1305011505 is an apocalyptic number.

1305011505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305011505 is a deficient number, since it is larger than the sum of its proper divisors (1081295439).

1305011505 is a wasteful number, since it uses less digits than its factorization.

1305011505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428696.

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 1305011505 is about 36124.9429757335. The cubic root of 1305011505 is about 1092.7935260259.

Adding to 1305011505 its reverse (5051105031), we get a palindrome (6356116536).

The spelling of 1305011505 in words is "one billion, three hundred five million, eleven thousand, five hundred five".