1312452605 has 4 divisors (see below), whose sum is σ = 1574943132. Its totient is φ = 1049962080.

The previous prime is 1312452601. The next prime is 1312452613. The reversal of 1312452605 is 5062542131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 952895161 + 359557444 = 30869^2 + 18962^2 .

It is not a de Polignac number, because 1312452605 - 2² = 1312452601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312452601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131245256 + ... + 131245265.

It is an arithmetic number, because the mean of its divisors is an integer number (393735783).

Almost surely, 2^1312452605 is an apocalyptic number.

It is an amenable number.

1312452605 is a deficient number, since it is larger than the sum of its proper divisors (262490527).

1312452605 is an equidigital number, since it uses as much as digits as its factorization.

1312452605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262490526.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1312452605 is about 36227.7877464247. The cubic root of 1312452605 is about 1094.8666059365.

Adding to 1312452605 its reverse (5062542131), we get a palindrome (6374994736).

The spelling of 1312452605 in words is "one billion, three hundred twelve million, four hundred fifty-two thousand, six hundred five".