1243109 has 8 divisors (see below), whose sum is σ = 1428288. Its totient is φ = 1059840.

The previous prime is 1243097. The next prime is 1243111. The reversal of 1243109 is 9013421.

1243109 = T₂₂₂ + T₂₂₃ + ... + T₂₆₃.

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 1243109 - 2⁴ = 1243093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243129) 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, 1454 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (178536).

2^1243109 is an apocalyptic number.

It is an amenable number.

1243109 is a deficient number, since it is larger than the sum of its proper divisors (185179).

1243109 is an equidigital number, since it uses as much as digits as its factorization.

1243109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1243109 is about 1114.9479808493. The cubic root of 1243109 is about 107.5234201722.

The spelling of 1243109 in words is "one million, two hundred forty-three thousand, one hundred nine".