1791126 has 32 divisors (see below), whose sum is σ = 4082400. Its totient is φ = 581760.

The previous prime is 1791121. The next prime is 1791161. The reversal of 1791126 is 6211971.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1791126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (127575).

2^1791126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1791126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041200).

1791126 is an abundant number, since it is smaller than the sum of its proper divisors (2291274).

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

1791126 is a wasteful number, since it uses less digits than its factorization.

1791126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 855 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 1791126 is about 1338.3295558270. The cubic root of 1791126 is about 121.4438087980.

The spelling of 1791126 in words is "one million, seven hundred ninety-one thousand, one hundred twenty-six".