1098123 has 16 divisors (see below), whose sum is σ = 1621536. Its totient is φ = 656640.

The previous prime is 1098121. The next prime is 1098133. The reversal of 1098123 is 3218901.

It is not a de Polignac number, because 1098123 - 2¹ = 1098121 is a prime.

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

It is a plaindrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1098093 and 1098102.

It is not an unprimeable number, because it can be changed into a prime (1098121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063 + ... + 1823.

It is an arithmetic number, because the mean of its divisors is an integer number (101346).

2^1098123 is an apocalyptic number.

1098123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1098123 is a deficient number, since it is larger than the sum of its proper divisors (523413).

1098123 is a wasteful number, since it uses less digits than its factorization.

1098123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1098123 is about 1047.9136414801. The cubic root of 1098123 is about 103.1692632759.

It can be divided in two parts, 1098 and 123, that added together give a palindrome (1221).

The spelling of 1098123 in words is "one million, ninety-eight thousand, one hundred twenty-three".