1212149 has 2 divisors, whose sum is σ = 1212150.
Its totient is φ = 1212148.
The previous prime is 1212121. The next prime is 1212173. The reversal of 1212149 is 9412121.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 611524 + 600625 = 782^2 + 775^2
It is a cyclic number.
It is not a de Polignac number, because 1212149 - 220 = 163573 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a self number, because there is not a number n which added to its sum of digits gives 1212149.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1212119) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606074 + 606075.
It is an arithmetic number, because the mean of its divisors is an integer number (606075).
21212149 is an apocalyptic number.
It is an amenable number.
1212149 is a deficient number, since it is larger than the sum of its proper divisors (1).
1212149 is an equidigital number, since it uses as much as digits as its factorization.
1212149 is an evil number, because the sum of its binary digits is even.
The product of its digits is 144, while the sum is 20.
The square root of 1212149 is about 1100.9763848512.
The cubic root of 1212149 is about 106.6232711932.
The spelling of 1212149 in words is "one million, two hundred twelve thousand, one hundred forty-nine".