1985219 has 2 divisors, whose sum is σ = 1985220. Its totient is φ = 1985218.

The previous prime is 1985213. The next prime is 1985227. The reversal of 1985219 is 9125891.

It is a weak prime.

It is an emirp because it is prime and its reverse (9125891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1985219 is a prime.

It is a super-2 number, since 2×1985219² = 7882188955922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1985213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992609 + 992610.

It is an arithmetic number, because the mean of its divisors is an integer number (992610).

2^1985219 is an apocalyptic number.

1985219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985219 is an equidigital number, since it uses as much as digits as its factorization.

1985219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 35.

The square root of 1985219 is about 1408.9779984088. The cubic root of 1985219 is about 125.6809556589.

It can be divided in two parts, 19 and 85219, that multiplied together give a palindrome (1619161).

The spelling of 1985219 in words is "one million, nine hundred eighty-five thousand, two hundred nineteen".