1981134 has 12 divisors (see below), whose sum is σ = 4292496. Its totient is φ = 660372.

The previous prime is 1981099. The next prime is 1981141. The reversal of 1981134 is 4311891.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1981098 and 1981107.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 55014 + ... + 55049.

It is an arithmetic number, because the mean of its divisors is an integer number (357708).

2^1981134 is an apocalyptic number.

1981134 is an abundant number, since it is smaller than the sum of its proper divisors (2311362).

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

1981134 is a wasteful number, since it uses less digits than its factorization.

1981134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110071 (or 110068 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1981134 is about 1407.5276196224. The cubic root of 1981134 is about 125.5946915819.

The spelling of 1981134 in words is "one million, nine hundred eighty-one thousand, one hundred thirty-four".