1312323445 has 12 divisors (see below), whose sum is σ = 1662036300. Its totient is φ = 994601664.

The previous prime is 1312323433. The next prime is 1312323451. The reversal of 1312323445 is 5443232131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 190274436 + 1122049009 = 13794^2 + 33497^2 .

It is not a de Polignac number, because 1312323445 - 2⁹ = 1312322933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361720 + ... + 365329.

It is an arithmetic number, because the mean of its divisors is an integer number (138503025).

Almost surely, 2^1312323445 is an apocalyptic number.

It is an amenable number.

1312323445 is a deficient number, since it is larger than the sum of its proper divisors (349712855).

1312323445 is an equidigital number, since it uses as much as digits as its factorization.

1312323445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727092 (or 727073 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 1312323445 is about 36226.0050930267. The cubic root of 1312323445 is about 1094.8306890561.

Adding to 1312323445 its reverse (5443232131), we get a palindrome (6755555576).

The spelling of 1312323445 in words is "one billion, three hundred twelve million, three hundred twenty-three thousand, four hundred forty-five".