1320201 has 9 divisors (see below), whose sum is σ = 1911949.
Its totient is φ = 877836.
The previous prime is 1320199. The next prime is 1320211. The reversal of 1320201 is 1020231.
Adding to 1320201 its reverse (1020231), we get a palindrome (2340432).
It can be divided in two parts, 1320 and 201, that added together give a square (1521 = 392).
It is a happy number.
The square root of 1320201 is 1149.
It is a perfect power (a square), and thus also a powerful number.
It is a tau number, because it is divible by the number of its divisors (9).
It is not a de Polignac number, because 1320201 - 21 = 1320199 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is an Ulam number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1320211) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3256 + ... + 3638.
21320201 is an apocalyptic number.
1320201 is the 1149-th square number.
1320201 is the 575-th centered octagonal number.
It is an amenable number.
1320201 is a deficient number, since it is larger than the sum of its proper divisors (591748).
1320201 is an frugal number, since it uses more digits than its factorization.
1320201 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 772 (or 386 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 9.
The cubic root of 1320201 is about 109.7016986757.
The spelling of 1320201 in words is "one million, three hundred twenty thousand, two hundred one".