1271042393 has 4 divisors (see below), whose sum is σ = 1271969508. Its totient is φ = 1270115280.

The previous prime is 1271042359. The next prime is 1271042401. The reversal of 1271042393 is 3932401721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1228362304 + 42680089 = 35048^2 + 6533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271042393 - 2⁸ = 1271042137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271042323) 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, 461498 + ... + 464243.

It is an arithmetic number, because the mean of its divisors is an integer number (317992377).

Almost surely, 2^1271042393 is an apocalyptic number.

It is an amenable number.

1271042393 is a deficient number, since it is larger than the sum of its proper divisors (927115).

1271042393 is an equidigital number, since it uses as much as digits as its factorization.

1271042393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927114.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1271042393 is about 35651.6814890967. The cubic root of 1271042393 is about 1083.2283355017.

The spelling of 1271042393 in words is "one billion, two hundred seventy-one million, forty-two thousand, three hundred ninety-three".