1249109 has 4 divisors (see below), whose sum is σ = 1322604. Its totient is φ = 1175616.

The previous prime is 1249099. The next prime is 1249111. The reversal of 1249109 is 9019421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1162084 + 87025 = 1078^2 + 295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249109 is a prime.

It is an Ulam number.

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 (1249139) 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, 36722 + ... + 36755.

It is an arithmetic number, because the mean of its divisors is an integer number (330651).

2^1249109 is an apocalyptic number.

It is an amenable number.

1249109 is a deficient number, since it is larger than the sum of its proper divisors (73495).

1249109 is an equidigital number, since it uses as much as digits as its factorization.

1249109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73494.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1249109 is about 1117.6354504041. The cubic root of 1249109 is about 107.6961337338.

The spelling of 1249109 in words is "one million, two hundred forty-nine thousand, one hundred nine".