1205117 has 2 divisors, whose sum is σ = 1205118. Its totient is φ = 1205116.

The previous prime is 1205101. The next prime is 1205119. The reversal of 1205117 is 7115021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 8281 = 1094^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205117 - 2⁴ = 1205101 is a prime.

Together with 1205119, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205095 and 1205104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602558 + 602559.

It is an arithmetic number, because the mean of its divisors is an integer number (602559).

2^1205117 is an apocalyptic number.

It is an amenable number.

1205117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205117 is an equidigital number, since it uses as much as digits as its factorization.

1205117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1205117 is about 1097.7782107512. The cubic root of 1205117 is about 106.4166878399.

The spelling of 1205117 in words is "one million, two hundred five thousand, one hundred seventeen".