1985397 has 8 divisors (see below), whose sum is σ = 2655456. Its totient is φ = 1319472.

The previous prime is 1985377. The next prime is 1985407. The reversal of 1985397 is 7935891.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1985397 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985317) 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 7 ways as a sum of consecutive naturals, for example, 358 + ... + 2024.

It is an arithmetic number, because the mean of its divisors is an integer number (331932).

2^1985397 is an apocalyptic number.

It is an amenable number.

1985397 is a deficient number, since it is larger than the sum of its proper divisors (670059).

1985397 is a wasteful number, since it uses less digits than its factorization.

1985397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067.

The product of its digits is 68040, while the sum is 42.

The square root of 1985397 is about 1409.0411633448. The cubic root of 1985397 is about 125.6847118426.

The spelling of 1985397 in words is "one million, nine hundred eighty-five thousand, three hundred ninety-seven".