1022729 has 2 divisors, whose sum is σ = 1022730. Its totient is φ = 1022728.

The previous prime is 1022719. The next prime is 1022761. The reversal of 1022729 is 9272201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 883600 + 139129 = 940^2 + 373^2 .

It is an emirp because it is prime and its reverse (9272201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1022729 - 2¹⁶ = 957193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1022719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511364 + 511365.

It is an arithmetic number, because the mean of its divisors is an integer number (511365).

2^1022729 is an apocalyptic number.

It is an amenable number.

1022729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022729 is an equidigital number, since it uses as much as digits as its factorization.

1022729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1022729 is about 1011.3006476810. The cubic root of 1022729 is about 100.7519646517.

The spelling of 1022729 in words is "one million, twenty-two thousand, seven hundred twenty-nine".