1345205105 has 8 divisors (see below), whose sum is σ = 1614444264. Its totient is φ = 1076032000.

The previous prime is 1345205101. The next prime is 1345205119. The reversal of 1345205105 is 5015025431.

It can be written as a sum of positive squares in 4 ways, for example, as 10837264 + 1334367841 = 3292^2 + 36529^2 .

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

It is not a de Polignac number, because 1345205105 - 2² = 1345205101 is a prime.

It is a super-2 number, since 2×1345205105² = 3619153549036122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345205101) 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, 63905 + ... + 82305.

It is an arithmetic number, because the mean of its divisors is an integer number (201805533).

Almost surely, 2^1345205105 is an apocalyptic number.

It is an amenable number.

1345205105 is a deficient number, since it is larger than the sum of its proper divisors (269239159).

1345205105 is a wasteful number, since it uses less digits than its factorization.

1345205105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33027.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1345205105 is about 36677.0378438608. The cubic root of 1345205105 is about 1103.8994126242.

The spelling of 1345205105 in words is "one billion, three hundred forty-five million, two hundred five thousand, one hundred five".