1089642 has 8 divisors (see below), whose sum is σ = 2179296. Its totient is φ = 363212.

The previous prime is 1089629. The next prime is 1089653. The reversal of 1089642 is 2469801.

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

1089642 is an admirable number.

It is a d-powerful number, because it can be written as 1 + 0 + 8³ + 9 + 6⁵ + 4¹⁰ + 2¹⁵ .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90798 + ... + 90809.

It is an arithmetic number, because the mean of its divisors is an integer number (272412).

2^1089642 is an apocalyptic number.

1089642 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.

1089642 is a wasteful number, since it uses less digits than its factorization.

1089642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181612.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1089642 is about 1043.8591859058. The cubic root of 1089642 is about 102.9029783591.

The spelling of 1089642 in words is "one million, eighty-nine thousand, six hundred forty-two".