1305105612 has 48 divisors (see below), whose sum is σ = 3116776320. Its totient is φ = 424935808.

The previous prime is 1305105601. The next prime is 1305105617. The reversal of 1305105612 is 2165015031.

It is not an unprimeable number, because it can be changed into a prime (1305105617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81283 + ... + 96005.

It is an arithmetic number, because the mean of its divisors is an integer number (64932840).

Almost surely, 2^1305105612 is an apocalyptic number.

1305105612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305105612 is an abundant number, since it is smaller than the sum of its proper divisors (1811670708).

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

1305105612 is a wasteful number, since it uses less digits than its factorization.

1305105612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14902 (or 14900 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1305105612 is about 36126.2454733397. The cubic root of 1305105612 is about 1092.8197932397.

The spelling of 1305105612 in words is "one billion, three hundred five million, one hundred five thousand, six hundred twelve".