1345123105 has 8 divisors (see below), whose sum is σ = 1614612672. Its totient is φ = 1075788528.

The previous prime is 1345123067. The next prime is 1345123177. The reversal of 1345123105 is 5013215431.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345123105 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345123105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18709 + ... + 55138.

It is an arithmetic number, because the mean of its divisors is an integer number (201826584).

Almost surely, 2^1345123105 is an apocalyptic number.

It is an amenable number.

1345123105 is a deficient number, since it is larger than the sum of its proper divisors (269489567).

1345123105 is an equidigital number, since it uses as much as digits as its factorization.

1345123105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77495.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1345123105 is about 36675.9199611952. The cubic root of 1345123105 is about 1103.8769819453.

Adding to 1345123105 its reverse (5013215431), we get a palindrome (6358338536).

The spelling of 1345123105 in words is "one billion, three hundred forty-five million, one hundred twenty-three thousand, one hundred five".