1021369 has 2 divisors, whose sum is σ = 1021370. Its totient is φ = 1021368.

The previous prime is 1021367. The next prime is 1021373. The reversal of 1021369 is 9631201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 238144 = 885^2 + 488^2 .

It is an emirp because it is prime and its reverse (9631201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021369 - 2¹ = 1021367 is a prime.

It is a super-2 number, since 2×1021369² = 2086389268322, which contains 22 as substring.

Together with 1021367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021367) 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, 510684 + 510685.

It is an arithmetic number, because the mean of its divisors is an integer number (510685).

2^1021369 is an apocalyptic number.

It is an amenable number.

1021369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021369 is an equidigital number, since it uses as much as digits as its factorization.

1021369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1021369 is about 1010.6280225681. The cubic root of 1021369 is about 100.7072856757.

The spelling of 1021369 in words is "one million, twenty-one thousand, three hundred sixty-nine".