1279971 has 24 divisors (see below), whose sum is σ = 2306304. Its totient is φ = 664560.

The previous prime is 1279969. The next prime is 1279997. The reversal of 1279971 is 1799721.

1279971 = 89² + 90² + ... + 165².

It is not a de Polignac number, because 1279971 - 2¹ = 1279969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1279921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (96096).

2^1279971 is an apocalyptic number.

1279971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1279971 is a deficient number, since it is larger than the sum of its proper divisors (1026333).

1279971 is a wasteful number, since it uses less digits than its factorization.

1279971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1868 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1279971 is about 1131.3580335155. The cubic root of 1279971 is about 108.5758846773.

It can be divided in two parts, 1 and 279971, that added together give a palindrome (279972).

The spelling of 1279971 in words is "one million, two hundred seventy-nine thousand, nine hundred seventy-one".