1278872 has 32 divisors (see below), whose sum is σ = 2812320. Its totient is φ = 533760.

The previous prime is 1278857. The next prime is 1278881. The reversal of 1278872 is 2788721.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2018 + ... + 2574.

It is an arithmetic number, because the mean of its divisors is an integer number (87885).

2^1278872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1406160).

1278872 is an abundant number, since it is smaller than the sum of its proper divisors (1533448).

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

1278872 is a wasteful number, since it uses less digits than its factorization.

1278872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 607 counting only the distinct ones).

The product of its digits is 12544, while the sum is 35.

The square root of 1278872 is about 1130.8722297413. The cubic root of 1278872 is about 108.5448008832.

The spelling of 1278872 in words is "one million, two hundred seventy-eight thousand, eight hundred seventy-two".