1198540 has 36 divisors (see below), whose sum is σ = 2930256. Its totient is φ = 410592.

The previous prime is 1198537. The next prime is 1198583. The reversal of 1198540 is 458911.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1198499 and 1198508.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (81396).

2^1198540 is an apocalyptic number.

1198540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465128).

1198540 is an abundant number, since it is smaller than the sum of its proper divisors (1731716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1198540 is a wasteful number, since it uses less digits than its factorization.

1198540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1198540 is about 1094.7785164133. The cubic root of 1198540 is about 106.2227427197. Note that the first 3 decimals are identical.

The spelling of 1198540 in words is "one million, one hundred ninety-eight thousand, five hundred forty".