1220201 has 4 divisors (see below), whose sum is σ = 1250004. Its totient is φ = 1190400.

The previous prime is 1220171. The next prime is 1220203. The reversal of 1220201 is 1020221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1020221 = 17 ⋅60013.

It can be written as a sum of positive squares in 2 ways, for example, as 115600 + 1104601 = 340^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220201 - 2¹⁰ = 1219177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14840 + ... + 14921.

It is an arithmetic number, because the mean of its divisors is an integer number (312501).

2^1220201 is an apocalyptic number.

It is an amenable number.

1220201 is a deficient number, since it is larger than the sum of its proper divisors (29803).

1220201 is an equidigital number, since it uses as much as digits as its factorization.

1220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29802.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1220201 is about 1104.6270863961. The cubic root of 1220201 is about 106.8588408477.

Adding to 1220201 its reverse (1020221), we get a palindrome (2240422).

The spelling of 1220201 in words is "one million, two hundred twenty thousand, two hundred one".