1311261074 has 4 divisors (see below), whose sum is σ = 1966891614. Its totient is φ = 655630536.

The previous prime is 1311261067. The next prime is 1311261089. The reversal of 1311261074 is 4701621131.

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

It can be written as a sum of positive squares in only one way, i.e., 890724025 + 420537049 = 29845^2 + 20507^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327815267 + ... + 327815270.

Almost surely, 2^1311261074 is an apocalyptic number.

1311261074 is a deficient number, since it is larger than the sum of its proper divisors (655630540).

1311261074 is an equidigital number, since it uses as much as digits as its factorization.

1311261074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655630539.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1311261074 is about 36211.3390252280. The cubic root of 1311261074 is about 1094.5351749228.

The spelling of 1311261074 in words is "one billion, three hundred eleven million, two hundred sixty-one thousand, seventy-four".