1278992 has 60 divisors (see below), whose sum is σ = 2995344. Its totient is φ = 524160.

The previous prime is 1278983. The next prime is 1278997. The reversal of 1278992 is 2998721.

It is not an unprimeable number, because it can be changed into a prime (1278997) 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, 29723 + ... + 29765.

2^1278992 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 1278992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497672).

1278992 is an abundant number, since it is smaller than the sum of its proper divisors (1716352).

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

1278992 is a wasteful number, since it uses less digits than its factorization.

1278992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 69 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 1278992 is about 1130.9252848884. The cubic root of 1278992 is about 108.5481957939.

It can be divided in two parts, 127 and 8992, that added together give a palindrome (9119).

The spelling of 1278992 in words is "one million, two hundred seventy-eight thousand, nine hundred ninety-two".