1281726 has 24 divisors (see below), whose sum is σ = 2867904. Its totient is φ = 413280.

The previous prime is 1281703. The next prime is 1281727. The reversal of 1281726 is 6271821.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 591 + ... + 1706.

It is an arithmetic number, because the mean of its divisors is an integer number (119496).

2^1281726 is an apocalyptic number.

1281726 is an abundant number, since it is smaller than the sum of its proper divisors (1586178).

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

1281726 is a wasteful number, since it uses less digits than its factorization.

1281726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2333 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1281726 is about 1132.1333843678. The cubic root of 1281726 is about 108.6254857110.

The spelling of 1281726 in words is "one million, two hundred eighty-one thousand, seven hundred twenty-six".