1312243245 has 12 divisors (see below), whose sum is σ = 2274555036. Its totient is φ = 699863040.

The previous prime is 1312243241. The next prime is 1312243319. The reversal of 1312243245 is 5423422131.

1312243245 is a `hidden beast` number, since 1 + 312 + 24 + 324 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1043742249 + 268500996 = 32307^2 + 16386^2 .

It is not a de Polignac number, because 1312243245 - 2² = 1312243241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312243241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14580436 + ... + 14580525.

It is an arithmetic number, because the mean of its divisors is an integer number (189546253).

Almost surely, 2^1312243245 is an apocalyptic number.

1312243245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312243245 is a deficient number, since it is larger than the sum of its proper divisors (962311791).

1312243245 is a wasteful number, since it uses less digits than its factorization.

1312243245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29160972 (or 29160969 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1312243245 is about 36224.8981365027. The cubic root of 1312243245 is about 1094.8083858121.

Adding to 1312243245 its reverse (5423422131), we get a palindrome (6735665376).

The spelling of 1312243245 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, two hundred forty-five".