1985453 has 2 divisors, whose sum is σ = 1985454. Its totient is φ = 1985452.

The previous prime is 1985441. The next prime is 1985471. The reversal of 1985453 is 3545891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1350244 + 635209 = 1162^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1985453 - 2¹⁰ = 1984429 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1985483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992726 + 992727.

It is an arithmetic number, because the mean of its divisors is an integer number (992727).

2^1985453 is an apocalyptic number.

It is an amenable number.

1985453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985453 is an equidigital number, since it uses as much as digits as its factorization.

1985453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 1985453 is about 1409.0610348739. The cubic root of 1985453 is about 125.6858935169.

The spelling of 1985453 in words is "one million, nine hundred eighty-five thousand, four hundred fifty-three".