1271253043 has 4 divisors (see below), whose sum is σ = 1272821368. Its totient is φ = 1269684720.

The previous prime is 1271253037. The next prime is 1271253059. The reversal of 1271253043 is 3403521721.

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

It is a cyclic number.

It is not a de Polignac number, because 1271253043 - 2⁹ = 1271252531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271253073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782946 + ... + 784567.

It is an arithmetic number, because the mean of its divisors is an integer number (318205342).

Almost surely, 2^1271253043 is an apocalyptic number.

1271253043 is a deficient number, since it is larger than the sum of its proper divisors (1568325).

1271253043 is an equidigital number, since it uses as much as digits as its factorization.

1271253043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568324.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1271253043 is about 35654.6356453127. The cubic root of 1271253043 is about 1083.2881733811.

Adding to 1271253043 its reverse (3403521721), we get a palindrome (4674774764).

The spelling of 1271253043 in words is "one billion, two hundred seventy-one million, two hundred fifty-three thousand, forty-three".