1270478791 has 4 divisors (see below), whose sum is σ = 1273796352. Its totient is φ = 1267161232.

The previous prime is 1270478779. The next prime is 1270478831. The reversal of 1270478791 is 1978740721.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1270478791 is a prime.

It is a super-2 number, since 2×1270478791² = 3228232716761643362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270478701) 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, 1658206 + ... + 1658971.

It is an arithmetic number, because the mean of its divisors is an integer number (318449088).

Almost surely, 2^1270478791 is an apocalyptic number.

1270478791 is a deficient number, since it is larger than the sum of its proper divisors (3317561).

1270478791 is an equidigital number, since it uses as much as digits as its factorization.

1270478791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317560.

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 1270478791 is about 35643.7763291153. The cubic root of 1270478791 is about 1083.0682044893.

The spelling of 1270478791 in words is "one billion, two hundred seventy million, four hundred seventy-eight thousand, seven hundred ninety-one".