1128642 has 8 divisors (see below), whose sum is σ = 2257296. Its totient is φ = 376212.

The previous prime is 1128641. The next prime is 1128643. The reversal of 1128642 is 2468211.

It is an interprime number because it is at equal distance from previous prime (1128641) and next prime (1128643).

It is a sphenic number, since it is the product of 3 distinct primes.

1128642 is an admirable number.

It is a d-powerful number, because it can be written as 1 + 1 + 2⁷ + 8³ + 6⁶ + 4¹⁰ + 2¹⁵ .

It is not an unprimeable number, because it can be changed into a prime (1128641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94048 + ... + 94059.

It is an arithmetic number, because the mean of its divisors is an integer number (282162).

2^1128642 is an apocalyptic number.

1128642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1128642 is a wasteful number, since it uses less digits than its factorization.

1128642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188112.

The product of its digits is 768, while the sum is 24.

The square root of 1128642 is about 1062.3756397810. The cubic root of 1128642 is about 104.1163023373.

It can be divided in two parts, 1128 and 642, that added together give a triangular number (1770 = T₅₉).

The spelling of 1128642 in words is "one million, one hundred twenty-eight thousand, six hundred forty-two".