1098955 has 32 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 698880.

The previous prime is 1098953. The next prime is 1098967. The reversal of 1098955 is 5598901.

It is not a de Polignac number, because 1098955 - 2¹ = 1098953 is a prime.

1098955 is a lucky number.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1098953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20709 + ... + 20761.

It is an arithmetic number, because the mean of its divisors is an integer number (51030).

2^1098955 is an apocalyptic number.

1098955 is a deficient number, since it is larger than the sum of its proper divisors (534005).

1098955 is a wasteful number, since it uses less digits than its factorization.

1098955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 1098955 is about 1048.3105455923. The cubic root of 1098955 is about 103.1953123184.

The spelling of 1098955 in words is "one million, ninety-eight thousand, nine hundred fifty-five".