1312432305 has 16 divisors (see below), whose sum is σ = 2106523584. Its totient is φ = 697753280.

The previous prime is 1312432229. The next prime is 1312432307. The reversal of 1312432305 is 5032342131.

It is not a de Polignac number, because 1312432305 - 2¹² = 1312428209 is a prime.

It is a super-2 number, since 2×1312432305² = 3444957110415226050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312432307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133251 + ... + 142760.

It is an arithmetic number, because the mean of its divisors is an integer number (131657724).

Almost surely, 2^1312432305 is an apocalyptic number.

1312432305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312432305 is a deficient number, since it is larger than the sum of its proper divisors (794091279).

1312432305 is a wasteful number, since it uses less digits than its factorization.

1312432305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276336.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1312432305 is about 36227.5075736656. The cubic root of 1312432305 is about 1094.8609610580.

Adding to 1312432305 its reverse (5032342131), we get a palindrome (6344774436).

The spelling of 1312432305 in words is "one billion, three hundred twelve million, four hundred thirty-two thousand, three hundred five".