1089287 has 4 divisors (see below), whose sum is σ = 1097376. Its totient is φ = 1081200.

The previous prime is 1089259. The next prime is 1089299. The reversal of 1089287 is 7829801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1089287 - 2⁶ = 1089223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089217) 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, 3839 + ... + 4112.

It is an arithmetic number, because the mean of its divisors is an integer number (274344).

2^1089287 is an apocalyptic number.

1089287 is a deficient number, since it is larger than the sum of its proper divisors (8089).

1089287 is an equidigital number, since it uses as much as digits as its factorization.

1089287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1089287 is about 1043.6891299616. The cubic root of 1089287 is about 102.8918020507.

The spelling of 1089287 in words is "one million, eighty-nine thousand, two hundred eighty-seven".