1331201 has 4 divisors (see below), whose sum is σ = 1356372. Its totient is φ = 1306032.

The previous prime is 1331153. The next prime is 1331207. The reversal of 1331201 is 1021331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 874225 + 456976 = 935^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331201 - 2¹⁰ = 1330177 is a prime.

It is a super-2 number, since 2×1331201² = 3544192204802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12506 + ... + 12611.

It is an arithmetic number, because the mean of its divisors is an integer number (339093).

It is a Proth number, since it is equal to 325 ⋅ 2¹² + 1 and 325 < 2¹².

2^1331201 is an apocalyptic number.

It is an amenable number.

1331201 is a deficient number, since it is larger than the sum of its proper divisors (25171).

1331201 is an equidigital number, since it uses as much as digits as its factorization.

1331201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25170.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1331201 is about 1153.7768415079. The cubic root of 1331201 is about 110.0055369114.

Adding to 1331201 its reverse (1021331), we get a palindrome (2352532).

The spelling of 1331201 in words is "one million, three hundred thirty-one thousand, two hundred one".