1208561 has 2 divisors, whose sum is σ = 1208562. Its totient is φ = 1208560.

The previous prime is 1208521. The next prime is 1208569. The reversal of 1208561 is 1658021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168561 + 40000 = 1081^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1208561 - 2¹⁰ = 1207537 is a prime.

It is a Chen prime.

It is equal to p₉₃₅₁₅ and since 1208561 and 93515 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1208569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604280 + 604281.

It is an arithmetic number, because the mean of its divisors is an integer number (604281).

2^1208561 is an apocalyptic number.

It is an amenable number.

1208561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208561 is an equidigital number, since it uses as much as digits as its factorization.

1208561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1208561 is about 1099.3457145048. The cubic root of 1208561 is about 106.5179644510.

The spelling of 1208561 in words is "one million, two hundred eight thousand, five hundred sixty-one".