1263871 has 8 divisors (see below), whose sum is σ = 1465344. Its totient is φ = 1067640.

The previous prime is 1263863. The next prime is 1263887. The reversal of 1263871 is 1783621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1263871 - 2³ = 1263863 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (183168).

2^1263871 is an apocalyptic number.

1263871 is a deficient number, since it is larger than the sum of its proper divisors (201473).

1263871 is an equidigital number, since it uses as much as digits as its factorization.

1263871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its digits is 2016, while the sum is 28.

The square root of 1263871 is about 1124.2201741652. The cubic root of 1263871 is about 108.1187251752.

The spelling of 1263871 in words is "one million, two hundred sixty-three thousand, eight hundred seventy-one".