1021487 has 2 divisors, whose sum is σ = 1021488. Its totient is φ = 1021486.

The previous prime is 1021483. The next prime is 1021541. The reversal of 1021487 is 7841201.

It is a weak prime.

It is an emirp because it is prime and its reverse (7841201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021487 - 2² = 1021483 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021483) 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, 510743 + 510744.

It is an arithmetic number, because the mean of its divisors is an integer number (510744).

2^1021487 is an apocalyptic number.

1021487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021487 is an equidigital number, since it uses as much as digits as its factorization.

1021487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1021487 is about 1010.6864004230. The cubic root of 1021487 is about 100.7111638046.

Adding to 1021487 its reverse (7841201), we get a palindrome (8862688).

It can be divided in two parts, 10214 and 87, that added together give a palindrome (10301).

The spelling of 1021487 in words is "one million, twenty-one thousand, four hundred eighty-seven".