1198605 has 8 divisors (see below), whose sum is σ = 1917792. Its totient is φ = 639248.

The previous prime is 1198583. The next prime is 1198607. The reversal of 1198605 is 5068911.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1198605 - 2¹⁵ = 1165837 is a prime.

1198605 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39939 + ... + 39968.

It is an arithmetic number, because the mean of its divisors is an integer number (239724).

2^1198605 is an apocalyptic number.

1198605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1198605 is a deficient number, since it is larger than the sum of its proper divisors (719187).

1198605 is an equidigital number, since it uses as much as digits as its factorization.

1198605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79915.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1198605 is about 1094.8082023807. The cubic root of 1198605 is about 106.2246629319.

The spelling of 1198605 in words is "one million, one hundred ninety-eight thousand, six hundred five".