1305103500 has 72 divisors (see below), whose sum is σ = 4117180704. Its totient is φ = 348026400.

The previous prime is 1305103487. The next prime is 1305103507. The reversal of 1305103500 is 53015031.

It is a happy number.

1305103500 is a `hidden beast` number, since 1 + 305 + 10 + 350 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1305103507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140512 + ... + 149511.

Almost surely, 2^1305103500 is an apocalyptic number.

1305103500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305103500 is an abundant number, since it is smaller than the sum of its proper divisors (2812077204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1305103500 is a wasteful number, since it uses less digits than its factorization.

1305103500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290048 (or 290033 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 1305103500 is about 36126.2162425018. The cubic root of 1305103500 is about 1092.8192037506.

Adding to 1305103500 its reverse (53015031), we get a palindrome (1358118531).

The spelling of 1305103500 in words is "one billion, three hundred five million, one hundred three thousand, five hundred".