1320001 has 4 divisors (see below), whose sum is σ = 1327104.
Its totient is φ = 1312900.
The previous prime is 1319963. The next prime is 1320019. The reversal of 1320001 is 1000231.
Adding to 1320001 its reverse (1000231), we get a palindrome (2320232).
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 1320001 - 215 = 1287233 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1320031) 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, 3265 + ... + 3646.
It is an arithmetic number, because the mean of its divisors is an integer number (331776).
21320001 is an apocalyptic number.
It is an amenable number.
1320001 is a deficient number, since it is larger than the sum of its proper divisors (7103).
1320001 is an equidigital number, since it uses as much as digits as its factorization.
1320001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7102.
The product of its (nonzero) digits is 6, while the sum is 7.
The square root of 1320001 is about 1148.9129645017.
The cubic root of 1320001 is about 109.6961587497.
The spelling of 1320001 in words is "one million, three hundred twenty thousand, one".