1098925 has 12 divisors (see below), whose sum is σ = 1378260. Its totient is φ = 869120.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098925 is 5298901.

It can be written as a sum of positive squares in 6 ways, for example, as 357604 + 741321 = 598^2 + 861^2 .

It is not a de Polignac number, because 1098925 - 2¹⁵ = 1066157 is a prime.

It is an alternating number because its digits alternate between odd and even.

1098925 is a lucky number.

It is a congruent number.

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, 2631 + ... + 3019.

It is an arithmetic number, because the mean of its divisors is an integer number (114855).

2^1098925 is an apocalyptic number.

It is an amenable number.

1098925 is a deficient number, since it is larger than the sum of its proper divisors (279335).

1098925 is a wasteful number, since it uses less digits than its factorization.

1098925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1098925 is about 1048.2962367575. The cubic root of 1098925 is about 103.1943732785.

The spelling of 1098925 in words is "one million, ninety-eight thousand, nine hundred twenty-five".