1245089 has 6 divisors (see below), whose sum is σ = 1314450. Its totient is φ = 1179216.

The previous prime is 1245067. The next prime is 1245091. The reversal of 1245089 is 9805421.

It can be written as a sum of positive squares in only one way, i.e., 667489 + 577600 = 817^2 + 760^2 .

It is not a de Polignac number, because 1245089 - 2⁸ = 1244833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1364 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (219075).

2^1245089 is an apocalyptic number.

1245089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1245089 is a deficient number, since it is larger than the sum of its proper divisors (69361).

1245089 is an equidigital number, since it uses as much as digits as its factorization.

1245089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487 (or 3468 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1245089 is about 1115.8355613620. The cubic root of 1245089 is about 107.5804769654.

The spelling of 1245089 in words is "one million, two hundred forty-five thousand, eighty-nine".