1089005 has 8 divisors (see below), whose sum is σ = 1312632. Its totient is φ = 867328.

The previous prime is 1088993. The next prime is 1089017. The reversal of 1089005 is 5009801.

It is an interprime number because it is at equal distance from previous prime (1088993) and next prime (1089017).

It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 1087849 = 34^2 + 1043^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1089005 - 2⁸ = 1088749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1457 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (164079).

2^1089005 is an apocalyptic number.

It is an amenable number.

1089005 is a deficient number, since it is larger than the sum of its proper divisors (223627).

1089005 is an equidigital number, since it uses as much as digits as its factorization.

1089005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1089005 is about 1043.5540235177. The cubic root of 1089005 is about 102.8829222383.

The spelling of 1089005 in words is "one million, eighty-nine thousand, five".