1991482 has 8 divisors (see below), whose sum is σ = 3162996. Its totient is φ = 937152.

The previous prime is 1991477. The next prime is 1991489. The reversal of 1991482 is 2841991.

It can be written as a sum of positive squares in 2 ways, for example, as 1485961 + 505521 = 1219^2 + 711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 58573 = 1991482 / (1 + 9 + 9 + 1 + 4 + 8 + 2).

It is not an unprimeable number, because it can be changed into a prime (1991489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29253 + ... + 29320.

2^1991482 is an apocalyptic number.

1991482 is a deficient number, since it is larger than the sum of its proper divisors (1171514).

1991482 is a wasteful number, since it uses less digits than its factorization.

1991482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58592.

The product of its digits is 5184, while the sum is 34.

The square root of 1991482 is about 1411.1987811786. The cubic root of 1991482 is about 125.8129836640.

It can be divided in two parts, 199 and 1482, that added together give a square (1681 = 41²).

The spelling of 1991482 in words is "one million, nine hundred ninety-one thousand, four hundred eighty-two".