1312811298 has 24 divisors (see below), whose sum is σ = 3011744268. Its totient is φ = 411862272.

The previous prime is 1312811263. The next prime is 1312811299. The reversal of 1312811298 is 8921182131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1276847289 + 35964009 = 35733^2 + 5997^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1312811299) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2144811 + ... + 2145422.

Almost surely, 2^1312811298 is an apocalyptic number.

1312811298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1312811298 is an abundant number, since it is smaller than the sum of its proper divisors (1698932970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312811298 is a wasteful number, since it uses less digits than its factorization.

1312811298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290258 (or 4290255 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 1312811298 is about 36232.7379313239. The cubic root of 1312811298 is about 1094.9663391166.

The spelling of 1312811298 in words is "one billion, three hundred twelve million, eight hundred eleven thousand, two hundred ninety-eight".