1312042345 has 8 divisors (see below), whose sum is σ = 1576620864. Its totient is φ = 1048187184.

The previous prime is 1312042343. The next prime is 1312042367. The reversal of 1312042345 is 5432402131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312042345 - 2¹ = 1312042343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312042343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176839 + ... + 184108.

It is an arithmetic number, because the mean of its divisors is an integer number (197077608).

Almost surely, 2^1312042345 is an apocalyptic number.

It is an amenable number.

1312042345 is a deficient number, since it is larger than the sum of its proper divisors (264578519).

1312042345 is an equidigital number, since it uses as much as digits as its factorization.

1312042345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361679.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1312042345 is about 36222.1250757048. The cubic root of 1312042345 is about 1094.7525124743.

Adding to 1312042345 its reverse (5432402131), we get a palindrome (6744444476).

The spelling of 1312042345 in words is "one billion, three hundred twelve million, forty-two thousand, three hundred forty-five".