1312240322 has 4 divisors (see below), whose sum is σ = 1968360486. Its totient is φ = 656120160.

The previous prime is 1312240313. The next prime is 1312240337. The reversal of 1312240322 is 2230422131.

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

It can be written as a sum of positive squares in only one way, i.e., 1041933841 + 270306481 = 32279^2 + 16441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1312240294 and 1312240303.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328060079 + ... + 328060082.

Almost surely, 2^1312240322 is an apocalyptic number.

1312240322 is a deficient number, since it is larger than the sum of its proper divisors (656120164).

1312240322 is an equidigital number, since it uses as much as digits as its factorization.

1312240322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656120163.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1312240322 is about 36224.8577913013. The cubic root of 1312240322 is about 1094.8075729223.

Adding to 1312240322 its reverse (2230422131), we get a palindrome (3542662453).

The spelling of 1312240322 in words is "one billion, three hundred twelve million, two hundred forty thousand, three hundred twenty-two".