1197985 has 4 divisors (see below), whose sum is σ = 1437588. Its totient is φ = 958384.

The previous prime is 1197971. The next prime is 1197997. The reversal of 1197985 is 5897911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5897911 = 37 ⋅159403.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 976144 = 471^2 + 988^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197985 - 2⁵ = 1197953 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119794 + ... + 119803.

It is an arithmetic number, because the mean of its divisors is an integer number (359397).

2^1197985 is an apocalyptic number.

It is an amenable number.

1197985 is a deficient number, since it is larger than the sum of its proper divisors (239603).

1197985 is an equidigital number, since it uses as much as digits as its factorization.

1197985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239602.

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

The square root of 1197985 is about 1094.5250111350. The cubic root of 1197985 is about 106.2063442337.

The spelling of 1197985 in words is "one million, one hundred ninety-seven thousand, nine hundred eighty-five".