1222187 has 2 divisors, whose sum is σ = 1222188.
Its totient is φ = 1222186.
The previous prime is 1222171. The next prime is 1222219. The reversal of 1222187 is 7812221.
It is a weak prime.
It is an emirp because it is prime and its reverse (7812221) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1222187 - 24 = 1222171 is a prime.
It is not a weakly prime, because it can be changed into another prime (1222157) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611093 + 611094.
It is an arithmetic number, because the mean of its divisors is an integer number (611094).
21222187 is an apocalyptic number.
1222187 is a deficient number, since it is larger than the sum of its proper divisors (1).
1222187 is an equidigital number, since it uses as much as digits as its factorization.
1222187 is an evil number, because the sum of its binary digits is even.
The product of its digits is 448, while the sum is 23.
The square root of 1222187 is about 1105.5256668210.
The cubic root of 1222187 is about 106.9167839310.
The spelling of 1222187 in words is "one million, two hundred twenty-two thousand, one hundred eighty-seven".