1053821 has 2 divisors, whose sum is σ = 1053822. Its totient is φ = 1053820.

The previous prime is 1053817. The next prime is 1053827. The reversal of 1053821 is 1283501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 151321 = 950^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053821 - 2² = 1053817 is a prime.

It is a super-2 number, since 2×1053821² = 2221077400082, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1053793 and 1053802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1053827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526910 + 526911.

It is an arithmetic number, because the mean of its divisors is an integer number (526911).

2^1053821 is an apocalyptic number.

It is an amenable number.

1053821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1053821 is an equidigital number, since it uses as much as digits as its factorization.

1053821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1053821 is about 1026.5578405526. The cubic root of 1053821 is about 101.7627769212.

The spelling of 1053821 in words is "one million, fifty-three thousand, eight hundred twenty-one".