1981484 has 6 divisors (see below), whose sum is σ = 3467604. Its totient is φ = 990740.

The previous prime is 1981477. The next prime is 1981487. The reversal of 1981484 is 4841891.

It is a super-3 number, since 3×1981484³ = 23339576116406363712, which contains 333 as substring.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1981487) 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 as a sum of consecutive naturals, namely, 247682 + ... + 247689.

It is an arithmetic number, because the mean of its divisors is an integer number (577934).

2^1981484 is an apocalyptic number.

It is an amenable number.

1981484 is a deficient number, since it is larger than the sum of its proper divisors (1486120).

1981484 is a wasteful number, since it uses less digits than its factorization.

1981484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495375 (or 495373 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 1981484 is about 1407.6519456172. The cubic root of 1981484 is about 125.6020872711.

The spelling of 1981484 in words is "one million, nine hundred eighty-one thousand, four hundred eighty-four".