1249009 has 4 divisors (see below), whose sum is σ = 1282804. Its totient is φ = 1215216.

The previous prime is 1248991. The next prime is 1249013. The reversal of 1249009 is 9009421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9009421 = 877 ⋅10273.

It can be written as a sum of positive squares in 2 ways, for example, as 970225 + 278784 = 985^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249009 - 2⁵ = 1248977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249019) 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 3 ways as a sum of consecutive naturals, for example, 16842 + ... + 16915.

It is an arithmetic number, because the mean of its divisors is an integer number (320701).

2^1249009 is an apocalyptic number.

It is an amenable number.

1249009 is a deficient number, since it is larger than the sum of its proper divisors (33795).

1249009 is an equidigital number, since it uses as much as digits as its factorization.

1249009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33794.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1249009 is about 1117.5907122019. The cubic root of 1249009 is about 107.6932597116.

The spelling of 1249009 in words is "one million, two hundred forty-nine thousand, nine".