1026521 has 2 divisors, whose sum is σ = 1026522. Its totient is φ = 1026520.

The previous prime is 1026481. The next prime is 1026547. The reversal of 1026521 is 1256201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 48400 = 989^2 + 220^2 .

It is an emirp because it is prime and its reverse (1256201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1026521 - 2⁶ = 1026457 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1026521.

It is not a weakly prime, because it can be changed into another prime (1026581) 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, 513260 + 513261.

It is an arithmetic number, because the mean of its divisors is an integer number (513261).

2^1026521 is an apocalyptic number.

It is an amenable number.

1026521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026521 is an equidigital number, since it uses as much as digits as its factorization.

1026521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1026521 is about 1013.1737264655. The cubic root of 1026521 is about 100.8763313344.

The spelling of 1026521 in words is "one million, twenty-six thousand, five hundred twenty-one".