1306171285 has 16 divisors (see below), whose sum is σ = 1663787952. Its totient is φ = 980992000.

The previous prime is 1306171277. The next prime is 1306171297. The reversal of 1306171285 is 5821716031.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 277622244 + 1028549041 = 16662^2 + 32071^2 .

It is not a de Polignac number, because 1306171285 - 2³ = 1306171277 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 1306171285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14925 + ... + 53245.

It is an arithmetic number, because the mean of its divisors is an integer number (103986747).

Almost surely, 2^1306171285 is an apocalyptic number.

It is an amenable number.

1306171285 is a deficient number, since it is larger than the sum of its proper divisors (357616667).

1306171285 is a wasteful number, since it uses less digits than its factorization.

1306171285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38744.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1306171285 is about 36140.9917545161. The cubic root of 1306171285 is about 1093.1171565852.

The spelling of 1306171285 in words is "one billion, three hundred six million, one hundred seventy-one thousand, two hundred eighty-five".