1021673 has 2 divisors, whose sum is σ = 1021674. Its totient is φ = 1021672.

The previous prime is 1021663. The next prime is 1021697. The reversal of 1021673 is 3761201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851929 + 169744 = 923^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021673 - 2⁸ = 1021417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510836 + 510837.

It is an arithmetic number, because the mean of its divisors is an integer number (510837).

2^1021673 is an apocalyptic number.

It is an amenable number.

1021673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021673 is an equidigital number, since it uses as much as digits as its factorization.

1021673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1021673 is about 1010.7784129076. The cubic root of 1021673 is about 100.7172761812.

Adding to 1021673 its reverse (3761201), we get a palindrome (4782874).

The spelling of 1021673 in words is "one million, twenty-one thousand, six hundred seventy-three".