1305312204 has 24 divisors (see below), whose sum is σ = 3480832768. Its totient is φ = 372946320.

The previous prime is 1305312187. The next prime is 1305312227. The reversal of 1305312204 is 4022135031.

It is a super-2 number, since 2×1305312204² = 3407679899822675232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7769632 + ... + 7769799.

Almost surely, 2^1305312204 is an apocalyptic number.

1305312204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1305312204 is an abundant number, since it is smaller than the sum of its proper divisors (2175520564).

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

1305312204 is a wasteful number, since it uses less digits than its factorization.

1305312204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15539445 (or 15539443 counting only the distinct ones).

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

The square root of 1305312204 is about 36129.1046664597. The cubic root of 1305312204 is about 1092.8774529195.

Adding to 1305312204 its reverse (4022135031), we get a palindrome (5327447235).

The spelling of 1305312204 in words is "one billion, three hundred five million, three hundred twelve thousand, two hundred four".