1305140232 has 32 divisors (see below), whose sum is σ = 3559474080. Its totient is φ = 395496960.

The previous prime is 1305140203. The next prime is 1305140251. The reversal of 1305140232 is 2320415031.

It is a junction number, because it is equal to n+sod(n) for n = 1305140199 and 1305140208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2471593 + ... + 2472120.

It is an arithmetic number, because the mean of its divisors is an integer number (111233565).

Almost surely, 2^1305140232 is an apocalyptic number.

1305140232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305140232 is an abundant number, since it is smaller than the sum of its proper divisors (2254333848).

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

1305140232 is a wasteful number, since it uses less digits than its factorization.

1305140232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943733 (or 4943729 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1305140232 is about 36126.7246231927. The cubic root of 1305140232 is about 1092.8294560814.

Adding to 1305140232 its reverse (2320415031), we get a palindrome (3625555263).

The spelling of 1305140232 in words is "one billion, three hundred five million, one hundred forty thousand, two hundred thirty-two".