1021879 has 2 divisors, whose sum is σ = 1021880. Its totient is φ = 1021878.

The previous prime is 1021861. The next prime is 1021897. The reversal of 1021879 is 9781201.

Together with next prime (1021897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1021861) and next prime (1021897).

It is an emirp because it is prime and its reverse (9781201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021879 - 2⁹ = 1021367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510939 + 510940.

It is an arithmetic number, because the mean of its divisors is an integer number (510940).

2^1021879 is an apocalyptic number.

1021879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021879 is an equidigital number, since it uses as much as digits as its factorization.

1021879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1021879 is about 1010.8803094333. The cubic root of 1021879 is about 100.7240449368.

The spelling of 1021879 in words is "one million, twenty-one thousand, eight hundred seventy-nine".