1306272745 has 4 divisors (see below), whose sum is σ = 1567527300. Its totient is φ = 1045018192.

The previous prime is 1306272701. The next prime is 1306272767. The reversal of 1306272745 is 5472726031.

It is a happy number.

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 297321049 + 1008951696 = 17243^2 + 31764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306272745 - 2¹⁷ = 1306141673 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130627270 + ... + 130627279.

It is an arithmetic number, because the mean of its divisors is an integer number (391881825).

Almost surely, 2^1306272745 is an apocalyptic number.

It is an amenable number.

1306272745 is a deficient number, since it is larger than the sum of its proper divisors (261254555).

1306272745 is an equidigital number, since it uses as much as digits as its factorization.

1306272745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261254554.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 1306272745 is about 36142.3953965423. The cubic root of 1306272745 is about 1093.1454593549.

Adding to 1306272745 its reverse (5472726031), we get a palindrome (6778998776).

The spelling of 1306272745 in words is "one billion, three hundred six million, two hundred seventy-two thousand, seven hundred forty-five".