1366601 has 2 divisors, whose sum is σ = 1366602. Its totient is φ = 1366600.

The previous prime is 1366597. The next prime is 1366609. The reversal of 1366601 is 1066631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 274576 = 1045^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366601 - 2² = 1366597 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1366609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683300 + 683301.

It is an arithmetic number, because the mean of its divisors is an integer number (683301).

2^1366601 is an apocalyptic number.

It is an amenable number.

1366601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366601 is an equidigital number, since it uses as much as digits as its factorization.

1366601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1366601 is about 1169.0171085147. The cubic root of 1366601 is about 110.9721272981.

The spelling of 1366601 in words is "one million, three hundred sixty-six thousand, six hundred one".