1273057871 has 4 divisors (see below), whose sum is σ = 1302663912. Its totient is φ = 1243451832.

The previous prime is 1273057847. The next prime is 1273057879. The reversal of 1273057871 is 1787503721.

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 1273057871 - 2¹⁴ = 1273041487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273057879) 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, 14802956 + ... + 14803041.

It is an arithmetic number, because the mean of its divisors is an integer number (325665978).

Almost surely, 2^1273057871 is an apocalyptic number.

1273057871 is a deficient number, since it is larger than the sum of its proper divisors (29606041).

1273057871 is an equidigital number, since it uses as much as digits as its factorization.

1273057871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29606040.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 1273057871 is about 35679.9365330153. The cubic root of 1273057871 is about 1083.8005875723.

The spelling of 1273057871 in words is "one billion, two hundred seventy-three million, fifty-seven thousand, eight hundred seventy-one".