1089851 has 4 divisors (see below), whose sum is σ = 1245552. Its totient is φ = 934152.

The previous prime is 1089841. The next prime is 1089863. The reversal of 1089851 is 1589801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1589801 = 479 ⋅3319.

It is a cyclic number.

It is not a de Polignac number, because 1089851 - 2¹⁰ = 1088827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1089841) 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, 77840 + ... + 77853.

It is an arithmetic number, because the mean of its divisors is an integer number (311388).

2^1089851 is an apocalyptic number.

1089851 is a deficient number, since it is larger than the sum of its proper divisors (155701).

1089851 is an equidigital number, since it uses as much as digits as its factorization.

1089851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155700.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 1089851 is about 1043.9592903940. The cubic root of 1089851 is about 102.9095570787.

The spelling of 1089851 in words is "one million, eighty-nine thousand, eight hundred fifty-one".