1122001 has 2 divisors, whose sum is σ = 1122002.
Its totient is φ = 1122000.
The previous prime is 1121993. The next prime is 1122029. The reversal of 1122001 is 1002211.
Adding to 1122001 its reverse (1002211), we get a palindrome (2124212).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1081600 + 40401 = 1040^2 + 201^2
It is a cyclic number.
It is not a de Polignac number, because 1122001 - 23 = 1121993 is a prime.
It is not a weakly prime, because it can be changed into another prime (1122041) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561000 + 561001.
It is an arithmetic number, because the mean of its divisors is an integer number (561001).
21122001 is an apocalyptic number.
It is an amenable number.
1122001 is a deficient number, since it is larger than the sum of its proper divisors (1).
1122001 is an equidigital number, since it uses as much as digits as its factorization.
1122001 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 1122001 is about 1059.2454861834.
The cubic root of 1122001 is about 103.9116915555.
The spelling of 1122001 in words is "one million, one hundred twenty-two thousand, one".