1366401 has 8 divisors (see below), whose sum is σ = 1827360. Its totient is φ = 908192.

The previous prime is 1366397. The next prime is 1366427. The reversal of 1366401 is 1046631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1366401 - 2² = 1366397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1366471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (228420).

2^1366401 is an apocalyptic number.

It is an amenable number.

1366401 is a deficient number, since it is larger than the sum of its proper divisors (460959).

1366401 is an equidigital number, since it uses as much as digits as its factorization.

1366401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1366401 is about 1168.9315634373. The cubic root of 1366401 is about 110.9667134993.

The spelling of 1366401 in words is "one million, three hundred sixty-six thousand, four hundred one".