1243489 has 8 divisors (see below), whose sum is σ = 1372392. Its totient is φ = 1119360.

The previous prime is 1243483. The next prime is 1243511. The reversal of 1243489 is 9843421.

It can be written as a sum of positive squares in 4 ways, for example, as 33489 + 1210000 = 183^2 + 1100^2 .

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 1243489 - 2³ = 1243481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243489.

It is not an unprimeable number, because it can be changed into a prime (1243481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634 + ... + 1699.

It is an arithmetic number, because the mean of its divisors is an integer number (171549).

2^1243489 is an apocalyptic number.

It is an amenable number.

1243489 is a deficient number, since it is larger than the sum of its proper divisors (128903).

1243489 is a wasteful number, since it uses less digits than its factorization.

1243489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387.

The product of its digits is 6912, while the sum is 31.

The square root of 1243489 is about 1115.1183793661. The cubic root of 1243489 is about 107.5343751614.

The spelling of 1243489 in words is "one million, two hundred forty-three thousand, four hundred eighty-nine".