1128492 has 54 divisors (see below), whose sum is σ = 3031028. Its totient is φ = 367416.

The previous prime is 1128451. The next prime is 1128497. The reversal of 1128492 is 2948211.

It is a tau number, because it is divible by the number of its divisors (54).

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1152) is a multiple of the sum of its prime divisors (48).

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (1128497) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26223 + ... + 26265.

2^1128492 is an apocalyptic number.

1128492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1515514).

1128492 is an abundant number, since it is smaller than the sum of its proper divisors (1902536).

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

1128492 is an frugal number, since it uses more digits than its factorization.

1128492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 48 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1128492 is about 1062.3050409369. The cubic root of 1128492 is about 104.1116896738. Note that the first 3 decimals are identical.

The spelling of 1128492 in words is "one million, one hundred twenty-eight thousand, four hundred ninety-two".