1092821 has 2 divisors, whose sum is σ = 1092822. Its totient is φ = 1092820.

The previous prime is 1092803. The next prime is 1092827. The reversal of 1092821 is 1282901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 302500 = 889^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1092821 - 2⁶ = 1092757 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1092827) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546410 + 546411.

It is an arithmetic number, because the mean of its divisors is an integer number (546411).

2^1092821 is an apocalyptic number.

It is an amenable number.

1092821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1092821 is an equidigital number, since it uses as much as digits as its factorization.

1092821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1092821 is about 1045.3807918649. The cubic root of 1092821 is about 103.0029533825.

The spelling of 1092821 in words is "one million, ninety-two thousand, eight hundred twenty-one".