1326401 has 4 divisors (see below), whose sum is σ = 1333332. Its totient is φ = 1319472.

The previous prime is 1326389. The next prime is 1326419. The reversal of 1326401 is 1046231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1046231 = 17 ⋅61543.

It can be written as a sum of positive squares in 2 ways, for example, as 1311025 + 15376 = 1145^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326401 - 2¹⁸ = 1064257 is a prime.

It is a super-2 number, since 2×1326401² = 3518679225602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1326401.

It is not an unprimeable number, because it can be changed into a prime (1326461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3170 + ... + 3563.

It is an arithmetic number, because the mean of its divisors is an integer number (333333).

2^1326401 is an apocalyptic number.

It is an amenable number.

1326401 is a deficient number, since it is larger than the sum of its proper divisors (6931).

1326401 is an equidigital number, since it uses as much as digits as its factorization.

1326401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1326401 is about 1151.6948380539. The cubic root of 1326401 is about 109.8731595823.

The spelling of 1326401 in words is "one million, three hundred twenty-six thousand, four hundred one".