1098225 has 24 divisors (see below), whose sum is σ = 2018720. Its totient is φ = 585360.

The previous prime is 1098221. The next prime is 1098233. The reversal of 1098225 is 5228901.

1098225 = 123² + 124² + ... + 172².

It is not a de Polignac number, because 1098225 - 2² = 1098221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1098221) 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, 139 + ... + 1488.

2^1098225 is an apocalyptic number.

1098225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1098225 is a deficient number, since it is larger than the sum of its proper divisors (920495).

1098225 is a wasteful number, since it uses less digits than its factorization.

1098225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1098225 is about 1047.9623084825. The cubic root of 1098225 is about 103.1724574958.

The spelling of 1098225 in words is "one million, ninety-eight thousand, two hundred twenty-five".