1305220532 has 48 divisors (see below), whose sum is σ = 2875471872. Its totient is φ = 503578080.

The previous prime is 1305220531. The next prime is 1305220571. The reversal of 1305220532 is 2350225031.

It is a junction number, because it is equal to n+sod(n) for n = 1305220498 and 1305220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305220531) 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, 11153 + ... + 52295.

It is an arithmetic number, because the mean of its divisors is an integer number (59905664).

Almost surely, 2^1305220532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1305220532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437735936).

1305220532 is an abundant number, since it is smaller than the sum of its proper divisors (1570251340).

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

1305220532 is a wasteful number, since it uses less digits than its factorization.

1305220532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41268 (or 41266 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1305220532 is about 36127.8359717268. The cubic root of 1305220532 is about 1092.8518680806.

Adding to 1305220532 its reverse (2350225031), we get a palindrome (3655445563).

The spelling of 1305220532 in words is "one billion, three hundred five million, two hundred twenty thousand, five hundred thirty-two".