1198861 has 2 divisors, whose sum is σ = 1198862. Its totient is φ = 1198860.

The previous prime is 1198853. The next prime is 1198867. The reversal of 1198861 is 1688911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 2025 = 1094^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198861 - 2³ = 1198853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599430 + 599431.

It is an arithmetic number, because the mean of its divisors is an integer number (599431).

2^1198861 is an apocalyptic number.

It is an amenable number.

1198861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198861 is an equidigital number, since it uses as much as digits as its factorization.

1198861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 34.

The square root of 1198861 is about 1094.9251115944. The cubic root of 1198861 is about 106.2322249388.

The spelling of 1198861 in words is "one million, one hundred ninety-eight thousand, eight hundred sixty-one".