1122201 has 16 divisors (see below), whose sum is σ = 1684800. Its totient is φ = 738144.

The previous prime is 1122181. The next prime is 1122227. The reversal of 1122201 is 1022211.

It is not a de Polignac number, because 1122201 - 2⁶ = 1122137 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 not an unprimeable number, because it can be changed into a prime (1122241) 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 15 ways as a sum of consecutive naturals, for example, 2170 + ... + 2636.

It is an arithmetic number, because the mean of its divisors is an integer number (105300).

2^1122201 is an apocalyptic number.

It is an amenable number.

1122201 is a deficient number, since it is larger than the sum of its proper divisors (562599).

1122201 is an equidigital number, since it uses as much as digits as its factorization.

1122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1122201 is about 1059.3398887987. The cubic root of 1122201 is about 103.9178653776.

Adding to 1122201 its reverse (1022211), we get a palindrome (2144412).

It can be divided in two parts, 1122 and 201, that multiplied together give a palindrome (225522).

The spelling of 1122201 in words is "one million, one hundred twenty-two thousand, two hundred one".