1985497 has 4 divisors (see below), whose sum is σ = 1989376. Its totient is φ = 1981620.

The previous prime is 1985491. The next prime is 1985509. The reversal of 1985497 is 7945891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7945891 = 503 ⋅15797.

It is a cyclic number.

It is not a de Polignac number, because 1985497 - 2¹⁵ = 1952729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985491) 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 in 3 ways as a sum of consecutive naturals, for example, 1029 + ... + 2242.

It is an arithmetic number, because the mean of its divisors is an integer number (497344).

2^1985497 is an apocalyptic number.

It is an amenable number.

1985497 is a deficient number, since it is larger than the sum of its proper divisors (3879).

1985497 is an equidigital number, since it uses as much as digits as its factorization.

1985497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878.

The product of its digits is 90720, while the sum is 43.

The square root of 1985497 is about 1409.0766480217. The cubic root of 1985497 is about 125.6868219596.

The spelling of 1985497 in words is "one million, nine hundred eighty-five thousand, four hundred ninety-seven".