1198305 has 24 divisors (see below), whose sum is σ = 2146560. Its totient is φ = 617760.

The previous prime is 1198303. The next prime is 1198321. The reversal of 1198305 is 5038911.

It is not a de Polignac number, because 1198305 - 2¹ = 1198303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1198303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 966 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (89440).

2^1198305 is an apocalyptic number.

1198305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1198305 is a deficient number, since it is larger than the sum of its proper divisors (948255).

1198305 is a wasteful number, since it uses less digits than its factorization.

1198305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1198305 is about 1094.6711835067. The cubic root of 1198305 is about 106.2157998347.

Subtracting 1198305 from its reverse (5038911), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1198305 in words is "one million, one hundred ninety-eight thousand, three hundred five".