1821486 has 8 divisors (see below), whose sum is σ = 3642984. Its totient is φ = 607160.

The previous prime is 1821481. The next prime is 1821487. The reversal of 1821486 is 6841281.

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

1821486 is an admirable number.

It is a super-2 number, since 2×1821486² = 6635622496392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821481) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 151785 + ... + 151796.

It is an arithmetic number, because the mean of its divisors is an integer number (455373).

2^1821486 is an apocalyptic number.

1821486 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1821486 is a wasteful number, since it uses less digits than its factorization.

1821486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303586.

The product of its digits is 3072, while the sum is 30.

The square root of 1821486 is about 1349.6243921921. The cubic root of 1821486 is about 122.1261348860.

The spelling of 1821486 in words is "one million, eight hundred twenty-one thousand, four hundred eighty-six".