1198445 has 4 divisors (see below), whose sum is σ = 1438140. Its totient is φ = 958752.

The previous prime is 1198433. The next prime is 1198447. The reversal of 1198445 is 5448911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5448911 = 13 ⋅419147.

It can be written as a sum of positive squares in 2 ways, for example, as 784996 + 413449 = 886^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198445 - 2⁸ = 1198189 is a prime.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119840 + ... + 119849.

It is an arithmetic number, because the mean of its divisors is an integer number (359535).

2^1198445 is an apocalyptic number.

It is an amenable number.

1198445 is a deficient number, since it is larger than the sum of its proper divisors (239695).

1198445 is an equidigital number, since it uses as much as digits as its factorization.

1198445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239694.

The product of its digits is 5760, while the sum is 32.

The square root of 1198445 is about 1094.7351277821. The cubic root of 1198445 is about 106.2199361308.

The spelling of 1198445 in words is "one million, one hundred ninety-eight thousand, four hundred forty-five".