1279872 has 96 divisors (see below), whose sum is σ = 4057560. Its totient is φ = 384000.

The previous prime is 1279871. The next prime is 1279877. The reversal of 1279872 is 2789721.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12622 + ... + 12722.

2^1279872 is an apocalyptic number.

1279872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028780).

1279872 is an abundant number, since it is smaller than the sum of its proper divisors (2777688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279872 is a wasteful number, since it uses less digits than its factorization.

1279872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 117 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1279872 is about 1131.3142799417. The cubic root of 1279872 is about 108.5730853197.

It can be divided in two parts, 127 and 9872, that added together give a palindrome (9999).

The spelling of 1279872 in words is "one million, two hundred seventy-nine thousand, eight hundred seventy-two".