1289249 has 4 divisors (see below), whose sum is σ = 1388436. Its totient is φ = 1190064.

The previous prime is 1289237. The next prime is 1289261. The reversal of 1289249 is 9429821.

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

It is an interprime number because it is at equal distance from previous prime (1289237) and next prime (1289261).

It can be written as a sum of positive squares in 2 ways, for example, as 165649 + 1123600 = 407^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1289249 - 2⁸ = 1288993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289149) 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, 49574 + ... + 49599.

It is an arithmetic number, because the mean of its divisors is an integer number (347109).

2^1289249 is an apocalyptic number.

It is an amenable number.

1289249 is a deficient number, since it is larger than the sum of its proper divisors (99187).

1289249 is an equidigital number, since it uses as much as digits as its factorization.

1289249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99186.

The product of its digits is 10368, while the sum is 35.

The square root of 1289249 is about 1135.4510117130. The cubic root of 1289249 is about 108.8375944639.

The spelling of 1289249 in words is "one million, two hundred eighty-nine thousand, two hundred forty-nine".