1312240337 has 2 divisors, whose sum is σ = 1312240338. Its totient is φ = 1312240336.

The previous prime is 1312240313. The next prime is 1312240361. The reversal of 1312240337 is 7330422131.

It is a balanced prime because it is at equal distance from previous prime (1312240313) and next prime (1312240361).

It can be written as a sum of positive squares in only one way, i.e., 1224930001 + 87310336 = 34999^2 + 9344^2 .

It is an emirp because it is prime and its reverse (7330422131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312240337 - 2¹⁴ = 1312223953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312140337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656120168 + 656120169.

It is an arithmetic number, because the mean of its divisors is an integer number (656120169).

Almost surely, 2^1312240337 is an apocalyptic number.

It is an amenable number.

1312240337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312240337 is an equidigital number, since it uses as much as digits as its factorization.

1312240337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 1312240337 is about 36224.8579983414. The cubic root of 1312240337 is about 1094.8075770938.

Adding to 1312240337 its reverse (7330422131), we get a palindrome (8642662468).

The spelling of 1312240337 in words is "one billion, three hundred twelve million, two hundred forty thousand, three hundred thirty-seven".