1981076 has 6 divisors (see below), whose sum is σ = 3466890. Its totient is φ = 990536.

The previous prime is 1981037. The next prime is 1981081. The reversal of 1981076 is 6701891.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 857476 = 1060^2 + 926^2 .

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 247631 + ... + 247638.

It is an arithmetic number, because the mean of its divisors is an integer number (577815).

2^1981076 is an apocalyptic number.

It is an amenable number.

1981076 is a deficient number, since it is larger than the sum of its proper divisors (1485814).

1981076 is a wasteful number, since it uses less digits than its factorization.

1981076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495273 (or 495271 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1981076 is about 1407.5070159683. The cubic root of 1981076 is about 125.5934659265.

The spelling of 1981076 in words is "one million, nine hundred eighty-one thousand, seventy-six".