1305213412 has 6 divisors (see below), whose sum is σ = 2284123478. Its totient is φ = 652606704.

The previous prime is 1305213409. The next prime is 1305213421. The reversal of 1305213412 is 2143125031.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1302921216 + 2292196 = 36096^2 + 1514^2 .

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 as a sum of consecutive naturals, namely, 163151673 + ... + 163151680.

Almost surely, 2^1305213412 is an apocalyptic number.

It is an amenable number.

1305213412 is a deficient number, since it is larger than the sum of its proper divisors (978910066).

1305213412 is a wasteful number, since it uses less digits than its factorization.

1305213412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326303357 (or 326303355 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1305213412 is about 36127.7374326154. The cubic root of 1305213412 is about 1092.8498809019.

Adding to 1305213412 its reverse (2143125031), we get a palindrome (3448338443).

The spelling of 1305213412 in words is "one billion, three hundred five million, two hundred thirteen thousand, four hundred twelve".