1129854 has 64 divisors (see below), whose sum is σ = 2799360. Its totient is φ = 299520.

The previous prime is 1129853. The next prime is 1129859. The reversal of 1129854 is 4589211.

It is a happy number.

It is a super-2 number, since 2×1129854² = 2553140122632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21292 + ... + 21344.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2^1129854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1129854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399680).

1129854 is an abundant number, since it is smaller than the sum of its proper divisors (1669506).

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

1129854 is a wasteful number, since it uses less digits than its factorization.

1129854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105.

The product of its digits is 2880, while the sum is 30.

The square root of 1129854 is about 1062.9459064317. The cubic root of 1129854 is about 104.1535576748.

The spelling of 1129854 in words is "one million, one hundred twenty-nine thousand, eight hundred fifty-four".