1231098 has 32 divisors (see below), whose sum is σ = 2806272. Its totient is φ = 356400.

The previous prime is 1231093. The next prime is 1231099. The reversal of 1231098 is 8901321.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1113 + ... + 1923.

It is an arithmetic number, because the mean of its divisors is an integer number (87696).

2^1231098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1403136).

1231098 is an abundant number, since it is smaller than the sum of its proper divisors (1575174).

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

1231098 is a wasteful number, since it uses less digits than its factorization.

1231098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850.

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

The square root of 1231098 is about 1109.5485568464. The cubic root of 1231098 is about 107.1759993979.

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

The spelling of 1231098 in words is "one million, two hundred thirty-one thousand, ninety-eight".