1089250 has 16 divisors (see below), whose sum is σ = 2039544. Its totient is φ = 435600.

The previous prime is 1089239. The next prime is 1089259. The reversal of 1089250 is 529801.

It can be written as a sum of positive squares in 4 ways, for example, as 720801 + 368449 = 849^2 + 607^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1089259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1929 + ... + 2428.

2^1089250 is an apocalyptic number.

1089250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1089250 is a deficient number, since it is larger than the sum of its proper divisors (950294).

1089250 is an equidigital number, since it uses as much as digits as its factorization.

1089250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1089250 is about 1043.6714042264. The cubic root of 1089250 is about 102.8906370563.

The spelling of 1089250 in words is "one million, eighty-nine thousand, two hundred fifty".