1271813434 has 4 divisors (see below), whose sum is σ = 1907720154. Its totient is φ = 635906716.

The previous prime is 1271813407. The next prime is 1271813441. The reversal of 1271813434 is 4343181721.

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., 1085900209 + 185913225 = 32953^2 + 13635^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1271813434.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 317953357 + ... + 317953360.

Almost surely, 2^1271813434 is an apocalyptic number.

1271813434 is a deficient number, since it is larger than the sum of its proper divisors (635906720).

1271813434 is an equidigital number, since it uses as much as digits as its factorization.

1271813434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635906719.

The product of its digits is 16128, while the sum is 34.

The square root of 1271813434 is about 35662.4933788988. The cubic root of 1271813434 is about 1083.4473275758.

The spelling of 1271813434 in words is "one billion, two hundred seventy-one million, eight hundred thirteen thousand, four hundred thirty-four".