1021087 has 2 divisors, whose sum is σ = 1021088. Its totient is φ = 1021086.

The previous prime is 1021081. The next prime is 1021091. The reversal of 1021087 is 7801201.

1021087 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021087 - 2⁷ = 1020959 is a prime.

It is an Ulam number.

It is equal to p₈₀₀₅₆ and since 1021087 and 80056 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021081) 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, 510543 + 510544.

It is an arithmetic number, because the mean of its divisors is an integer number (510544).

2^1021087 is an apocalyptic number.

1021087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021087 is an equidigital number, since it uses as much as digits as its factorization.

1021087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1021087 is about 1010.4884957287. The cubic root of 1021087 is about 100.6980163947.

Adding to 1021087 its reverse (7801201), we get a palindrome (8822288).

The spelling of 1021087 in words is "one million, twenty-one thousand, eighty-seven".