1298730266 has 16 divisors (see below), whose sum is σ = 2118439656. Its totient is φ = 594648576.

The previous prime is 1298730239. The next prime is 1298730281. The reversal of 1298730266 is 6620378921.

It can be written as a sum of positive squares in 4 ways, for example, as 1133736241 + 164994025 = 33671^2 + 12845^2 .

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, 514931 + ... + 517446.

Almost surely, 2^1298730266 is an apocalyptic number.

1298730266 is a deficient number, since it is larger than the sum of its proper divisors (819709390).

1298730266 is a wasteful number, since it uses less digits than its factorization.

1298730266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032433.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1298730266 is about 36037.9004105400. The cubic root of 1298730266 is about 1091.0374394540.

The spelling of 1298730266 in words is "one billion, two hundred ninety-eight million, seven hundred thirty thousand, two hundred sixty-six".