1276263671 has 4 divisors (see below), whose sum is σ = 1277401272. Its totient is φ = 1275126072.

The previous prime is 1276263647. The next prime is 1276263713. The reversal of 1276263671 is 1763626721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1763626721 = 19 ⋅92822459.

It is not a de Polignac number, because 1276263671 - 2¹⁸ = 1276001527 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 (1276263071) 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, 567116 + ... + 569361.

It is an arithmetic number, because the mean of its divisors is an integer number (319350318).

Almost surely, 2^1276263671 is an apocalyptic number.

1276263671 is a deficient number, since it is larger than the sum of its proper divisors (1137601).

1276263671 is a wasteful number, since it uses less digits than its factorization.

1276263671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137600.

The product of its digits is 127008, while the sum is 41.

The square root of 1276263671 is about 35724.8326938000. The cubic root of 1276263671 is about 1084.7095631545.

The spelling of 1276263671 in words is "one billion, two hundred seventy-six million, two hundred sixty-three thousand, six hundred seventy-one".