1305315145 has 4 divisors (see below), whose sum is σ = 1566378180. Its totient is φ = 1044252112.

The previous prime is 1305315127. The next prime is 1305315203. The reversal of 1305315145 is 5415135031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 745945344 + 559369801 = 27312^2 + 23651^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305315145 - 2¹³ = 1305306953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130531510 + ... + 130531519.

It is an arithmetic number, because the mean of its divisors is an integer number (391594545).

Almost surely, 2^1305315145 is an apocalyptic number.

It is an amenable number.

1305315145 is a deficient number, since it is larger than the sum of its proper divisors (261063035).

1305315145 is an equidigital number, since it uses as much as digits as its factorization.

1305315145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261063034.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1305315145 is about 36129.1453676945. The cubic root of 1305315145 is about 1092.8782737066.

The spelling of 1305315145 in words is "one billion, three hundred five million, three hundred fifteen thousand, one hundred forty-five".