1305133212 has 12 divisors (see below), whose sum is σ = 3045310856. Its totient is φ = 435044400.

The previous prime is 1305133187. The next prime is 1305133241. The reversal of 1305133212 is 2123315031.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54380539 + ... + 54380562.

Almost surely, 2^1305133212 is an apocalyptic number.

1305133212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305133212 is an abundant number, since it is smaller than the sum of its proper divisors (1740177644).

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

1305133212 is a wasteful number, since it uses less digits than its factorization.

1305133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108761108 (or 108761106 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1305133212 is about 36126.6274650707. The cubic root of 1305133212 is about 1092.8274967321.

Adding to 1305133212 its reverse (2123315031), we get a palindrome (3428448243).

The spelling of 1305133212 in words is "one billion, three hundred five million, one hundred thirty-three thousand, two hundred twelve".