1812341 has 2 divisors, whose sum is σ = 1812342.
Its totient is φ = 1812340.
The previous prime is 1812311. The next prime is 1812347. The reversal of 1812341 is 1432181.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1811716 + 625 = 1346^2 + 25^2
It is an emirp because it is prime and its reverse (1432181) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1812341 - 214 = 1795957 is a prime.
It is a Sophie Germain prime.
It is an alternating number because its digits alternate between odd and even.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1812347) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906170 + 906171.
It is an arithmetic number, because the mean of its divisors is an integer number (906171).
21812341 is an apocalyptic number.
It is an amenable number.
1812341 is a deficient number, since it is larger than the sum of its proper divisors (1).
1812341 is an equidigital number, since it uses as much as digits as its factorization.
1812341 is an evil number, because the sum of its binary digits is even.
The product of its digits is 192, while the sum is 20.
The square root of 1812341 is about 1346.2321493710.
The cubic root of 1812341 is about 121.9214086682.
The spelling of 1812341 in words is "one million, eight hundred twelve thousand, three hundred forty-one".