1271200457 has 4 divisors (see below), whose sum is σ = 1272921360. Its totient is φ = 1269479556.

The previous prime is 1271200417. The next prime is 1271200481. The reversal of 1271200457 is 7540021721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1271200457 - 2²⁶ = 1204091593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271200417) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 859343 + ... + 860820.

It is an arithmetic number, because the mean of its divisors is an integer number (318230340).

Almost surely, 2^1271200457 is an apocalyptic number.

It is an amenable number.

1271200457 is a deficient number, since it is larger than the sum of its proper divisors (1720903).

1271200457 is an equidigital number, since it uses as much as digits as its factorization.

1271200457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720902.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 1271200457 is about 35653.8982020199. The cubic root of 1271200457 is about 1083.2732362612.

The spelling of 1271200457 in words is "one billion, two hundred seventy-one million, two hundred thousand, four hundred fifty-seven".