1198661 has 2 divisors, whose sum is σ = 1198662. Its totient is φ = 1198660.

The previous prime is 1198651. The next prime is 1198669. The reversal of 1198661 is 1668911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 776161 + 422500 = 881^2 + 650^2 .

It is an emirp because it is prime and its reverse (1668911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1198661 - 2¹⁴ = 1182277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599330 + 599331.

It is an arithmetic number, because the mean of its divisors is an integer number (599331).

2^1198661 is an apocalyptic number.

It is an amenable number.

1198661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198661 is an equidigital number, since it uses as much as digits as its factorization.

1198661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 32.

The square root of 1198661 is about 1094.8337773379. The cubic root of 1198661 is about 106.2263172129.

The spelling of 1198661 in words is "one million, one hundred ninety-eight thousand, six hundred sixty-one".