1098825 has 72 divisors (see below), whose sum is σ = 2374848. Its totient is φ = 443520.

The previous prime is 1098821. The next prime is 1098833. The reversal of 1098825 is 5288901.

It is a happy number.

It is not a de Polignac number, because 1098825 - 2² = 1098821 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1098821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 47764 + ... + 47786.

It is an arithmetic number, because the mean of its divisors is an integer number (32984).

2^1098825 is an apocalyptic number.

1098825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1098825 is an abundant number, since it is smaller than the sum of its proper divisors (1276023).

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

1098825 is a wasteful number, since it uses less digits than its factorization.

1098825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1098825 is about 1048.2485392310. The cubic root of 1098825 is about 103.1912430224.

The spelling of 1098825 in words is "one million, ninety-eight thousand, eight hundred twenty-five".