1108021 has 2 divisors, whose sum is σ = 1108022. Its totient is φ = 1108020.

The previous prime is 1108007. The next prime is 1108049. The reversal of 1108021 is 1208011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 376996 = 855^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1108021 - 2⁵ = 1107989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1107992 and 1108010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1108001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554010 + 554011.

It is an arithmetic number, because the mean of its divisors is an integer number (554011).

2^1108021 is an apocalyptic number.

It is an amenable number.

1108021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108021 is an equidigital number, since it uses as much as digits as its factorization.

1108021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1108021 is about 1052.6257644576. The cubic root of 1108021 is about 103.4783107795.

The spelling of 1108021 in words is "one million, one hundred eight thousand, twenty-one".