1209117 has 32 divisors (see below), whose sum is σ = 2050048. Its totient is φ = 616896.

The previous prime is 1209113. The next prime is 1209121. The reversal of 1209117 is 7119021.

It is an interprime number because it is at equal distance from previous prime (1209113) and next prime (1209121).

It is not a de Polignac number, because 1209117 - 2² = 1209113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1209093 and 1209102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209113) 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 31 ways as a sum of consecutive naturals, for example, 11688 + ... + 11790.

It is an arithmetic number, because the mean of its divisors is an integer number (64064).

2^1209117 is an apocalyptic number.

It is an amenable number.

1209117 is a deficient number, since it is larger than the sum of its proper divisors (840931).

1209117 is a wasteful number, since it uses less digits than its factorization.

1209117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 1209117 is about 1099.5985631129. The cubic root of 1209117 is about 106.5342965210.

It can be divided in two parts, 1209 and 117, that added together give a triangular number (1326 = T₅₁).

The spelling of 1209117 in words is "one million, two hundred nine thousand, one hundred seventeen".