1147021 has 2 divisors, whose sum is σ = 1147022. Its totient is φ = 1147020.

The previous prime is 1147009. The next prime is 1147039. The reversal of 1147021 is 1207411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 44521 = 1050^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1147021 - 2⁵ = 1146989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1146986 and 1147004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573510 + 573511.

It is an arithmetic number, because the mean of its divisors is an integer number (573511).

2^1147021 is an apocalyptic number.

It is an amenable number.

1147021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147021 is an equidigital number, since it uses as much as digits as its factorization.

1147021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1147021 is about 1070.9906628911. The cubic root of 1147021 is about 104.6784113740.

The spelling of 1147021 in words is "one million, one hundred forty-seven thousand, twenty-one".