1842289 has 2 divisors, whose sum is σ = 1842290. Its totient is φ = 1842288.

The previous prime is 1842287. The next prime is 1842293. The reversal of 1842289 is 9822481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 242064 = 1265^2 + 492^2 .

It is a cyclic number.

It is not a de Polignac number, because 1842289 - 2¹ = 1842287 is a prime.

Together with 1842287, it forms a pair of twin primes.

It is an Ulam number.

It is equal to p₁₃₇₉₉₅ and since 1842289 and 137995 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1842287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921144 + 921145.

It is an arithmetic number, because the mean of its divisors is an integer number (921145).

2^1842289 is an apocalyptic number.

It is an amenable number.

1842289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842289 is an equidigital number, since it uses as much as digits as its factorization.

1842289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 1842289 is about 1357.3094709756. The cubic root of 1842289 is about 122.5893059730.

The spelling of 1842289 in words is "one million, eight hundred forty-two thousand, two hundred eighty-nine".