1278871 has 16 divisors (see below), whose sum is σ = 1526400. Its totient is φ = 1058400.

The previous prime is 1278857. The next prime is 1278881. The reversal of 1278871 is 1788721.

It is a cyclic number.

It is not a de Polignac number, because 1278871 - 2⁵ = 1278839 is a prime.

It is a super-2 number, since 2×1278871² = 3271022069282, which contains 22 as substring.

It is a Duffinian number.

1278871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5956 + ... + 6166.

It is an arithmetic number, because the mean of its divisors is an integer number (95400).

2^1278871 is an apocalyptic number.

1278871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1278871 is a deficient number, since it is larger than the sum of its proper divisors (247529).

1278871 is a wasteful number, since it uses less digits than its factorization.

1278871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 6272, while the sum is 34.

The square root of 1278871 is about 1130.8717876046. The cubic root of 1278871 is about 108.5447725914.

It can be divided in two parts, 127 and 8871, that added together give a palindrome (8998).

The spelling of 1278871 in words is "one million, two hundred seventy-eight thousand, eight hundred seventy-one".