1320401 has 4 divisors (see below), whose sum is σ = 1351152. Its totient is φ = 1289652.

The previous prime is 1320391. The next prime is 1320409. The reversal of 1320401 is 1040231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320401 - 2⁶ = 1320337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320409) 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, 15311 + ... + 15396.

It is an arithmetic number, because the mean of its divisors is an integer number (337788).

2^1320401 is an apocalyptic number.

It is an amenable number.

1320401 is a deficient number, since it is larger than the sum of its proper divisors (30751).

1320401 is an equidigital number, since it uses as much as digits as its factorization.

1320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30750.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1320401 is about 1149.0870289060. The cubic root of 1320401 is about 109.7072380423.

Adding to 1320401 its reverse (1040231), we get a palindrome (2360632).

The spelling of 1320401 in words is "one million, three hundred twenty thousand, four hundred one".