1366241 has 2 divisors, whose sum is σ = 1366242. Its totient is φ = 1366240.

The previous prime is 1366213. The next prime is 1366279. The reversal of 1366241 is 1426631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 519841 = 920^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366241 - 2¹⁸ = 1104097 is a prime.

It is a super-2 number, since 2×1366241² = 3733228940162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1366291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683120 + 683121.

It is an arithmetic number, because the mean of its divisors is an integer number (683121).

2^1366241 is an apocalyptic number.

It is an amenable number.

1366241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366241 is an equidigital number, since it uses as much as digits as its factorization.

1366241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 1366241 is about 1168.8631228677. The cubic root of 1366241 is about 110.9623820800.

The spelling of 1366241 in words is "one million, three hundred sixty-six thousand, two hundred forty-one".