1997185 has 8 divisors (see below), whose sum is σ = 2522880. Its totient is φ = 1513584.

The previous prime is 1997183. The next prime is 1997189. The reversal of 1997185 is 5817991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1997185 - 2¹ = 1997183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997183) by changing a digit.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10417 + ... + 10606.

It is an arithmetic number, because the mean of its divisors is an integer number (315360).

2^1997185 is an apocalyptic number.

It is an amenable number.

1997185 is a deficient number, since it is larger than the sum of its proper divisors (525695).

1997185 is a wasteful number, since it uses less digits than its factorization.

1997185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21047.

The product of its digits is 22680, while the sum is 40.

The square root of 1997185 is about 1413.2179591273. The cubic root of 1997185 is about 125.9329659388.

The spelling of 1997185 in words is "one million, nine hundred ninety-seven thousand, one hundred eighty-five".