1312152245 has 4 divisors (see below), whose sum is σ = 1574582700. Its totient is φ = 1049721792.

The previous prime is 1312152239. The next prime is 1312152253. The reversal of 1312152245 is 5422512131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5422512131 = 23 ⋅235761397.

It can be written as a sum of positive squares in 2 ways, for example, as 158734801 + 1153417444 = 12599^2 + 33962^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312152245 - 2¹⁰ = 1312151221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131215220 + ... + 131215229.

It is an arithmetic number, because the mean of its divisors is an integer number (393645675).

Almost surely, 2^1312152245 is an apocalyptic number.

It is an amenable number.

1312152245 is a deficient number, since it is larger than the sum of its proper divisors (262430455).

1312152245 is an equidigital number, since it uses as much as digits as its factorization.

1312152245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262430454.

The product of its digits is 2400, while the sum is 26.

The square root of 1312152245 is about 36223.6420725470. The cubic root of 1312152245 is about 1094.7830780382.

Adding to 1312152245 its reverse (5422512131), we get a palindrome (6734664376).

The spelling of 1312152245 in words is "one billion, three hundred twelve million, one hundred fifty-two thousand, two hundred forty-five".