1198917 has 6 divisors (see below), whose sum is σ = 1731782. Its totient is φ = 799272.

The previous prime is 1198903. The next prime is 1198927. The reversal of 1198917 is 7198911.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 12996 = 1089^2 + 114^2 .

It is not a de Polignac number, because 1198917 - 2⁶ = 1198853 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66598 + ... + 66615.

2^1198917 is an apocalyptic number.

It is an amenable number.

1198917 is a deficient number, since it is larger than the sum of its proper divisors (532865).

1198917 is a wasteful number, since it uses less digits than its factorization.

1198917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133219 (or 133216 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The square root of 1198917 is about 1094.9506838210. The cubic root of 1198917 is about 106.2338789843.

The spelling of 1198917 in words is "one million, one hundred ninety-eight thousand, nine hundred seventeen".