1311020434 has 8 divisors (see below), whose sum is σ = 1970306748. Its totient is φ = 654251520.

The previous prime is 1311020407. The next prime is 1311020471. The reversal of 1311020434 is 4340201131.

It can be written as a sum of positive squares in 2 ways, for example, as 1136701225 + 174319209 = 33715^2 + 13203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628047 + ... + 630130.

Almost surely, 2^1311020434 is an apocalyptic number.

1311020434 is a deficient number, since it is larger than the sum of its proper divisors (659286314).

1311020434 is a wasteful number, since it uses less digits than its factorization.

1311020434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258700.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1311020434 is about 36208.0161566469. The cubic root of 1311020434 is about 1094.4682151939.

Adding to 1311020434 its reverse (4340201131), we get a palindrome (5651221565).

The spelling of 1311020434 in words is "one billion, three hundred eleven million, twenty thousand, four hundred thirty-four".