1222001 has 4 divisors (see below), whose sum is σ = 1333104. Its totient is φ = 1110900.

The previous prime is 1221971. The next prime is 1222003. The reversal of 1222001 is 1002221.

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 1222001 - 2⁶ = 1221937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222001.

It is not an unprimeable number, because it can be changed into a prime (1222003) 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, 55535 + ... + 55556.

It is an arithmetic number, because the mean of its divisors is an integer number (333276).

2^1222001 is an apocalyptic number.

1222001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222001 is a deficient number, since it is larger than the sum of its proper divisors (111103).

1222001 is a wasteful number, since it uses less digits than its factorization.

1222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111102.

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

The square root of 1222001 is about 1105.4415407429. The cubic root of 1222001 is about 106.9113599027.

Adding to 1222001 its reverse (1002221), we get a palindrome (2224222).

The spelling of 1222001 in words is "one million, two hundred twenty-two thousand, one".