1084821 has 16 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 670208.

The previous prime is 1084817. The next prime is 1084823. The reversal of 1084821 is 1284801.

It is not a de Polignac number, because 1084821 - 2² = 1084817 is a prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1084791 and 1084800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4420 + ... + 4658.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^1084821 is an apocalyptic number.

It is an amenable number.

1084821 is a deficient number, since it is larger than the sum of its proper divisors (470379).

1084821 is a wasteful number, since it uses less digits than its factorization.

1084821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 1084821 is about 1041.5474065063. The cubic root of 1084821 is about 102.7509930582.

The spelling of 1084821 in words is "one million, eighty-four thousand, eight hundred twenty-one".