1208521 has 2 divisors, whose sum is σ = 1208522. Its totient is φ = 1208520.

The previous prime is 1208507. The next prime is 1208561. The reversal of 1208521 is 1258021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 230400 = 989^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1208521 - 2¹⁷ = 1077449 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1208561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604260 + 604261.

It is an arithmetic number, because the mean of its divisors is an integer number (604261).

2^1208521 is an apocalyptic number.

It is an amenable number.

1208521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208521 is an equidigital number, since it uses as much as digits as its factorization.

1208521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1208521 is about 1099.3275217150. The cubic root of 1208521 is about 106.5167892889.

The spelling of 1208521 in words is "one million, two hundred eight thousand, five hundred twenty-one".