1305142345 has 8 divisors (see below), whose sum is σ = 1686645576. Its totient is φ = 963797376.

The previous prime is 1305142339. The next prime is 1305142367. The reversal of 1305142345 is 5432415031.

It can be written as a sum of positive squares in 4 ways, for example, as 32936121 + 1272206224 = 5739^2 + 35668^2 .

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 1305142345 - 2¹¹ = 1305140297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10039492 + ... + 10039621.

It is an arithmetic number, because the mean of its divisors is an integer number (210830697).

Almost surely, 2^1305142345 is an apocalyptic number.

It is an amenable number.

1305142345 is a deficient number, since it is larger than the sum of its proper divisors (381503231).

1305142345 is a wasteful number, since it uses less digits than its factorization.

1305142345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20079131.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1305142345 is about 36126.7538674595. The cubic root of 1305142345 is about 1092.8300458385.

Adding to 1305142345 its reverse (5432415031), we get a palindrome (6737557376).

The spelling of 1305142345 in words is "one billion, three hundred five million, one hundred forty-two thousand, three hundred forty-five".