1247117 has 2 divisors, whose sum is σ = 1247118. Its totient is φ = 1247116.

The previous prime is 1247107. The next prime is 1247119. The reversal of 1247117 is 7117421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988036 + 259081 = 994^2 + 509^2 .

It is an emirp because it is prime and its reverse (7117421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1247117 - 2⁴ = 1247101 is a prime.

Together with 1247119, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1247092 and 1247101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623558 + 623559.

It is an arithmetic number, because the mean of its divisors is an integer number (623559).

2^1247117 is an apocalyptic number.

It is an amenable number.

1247117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247117 is an equidigital number, since it uses as much as digits as its factorization.

1247117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392, while the sum is 23.

The square root of 1247117 is about 1116.7439276755. The cubic root of 1247117 is about 107.6388542811.

The spelling of 1247117 in words is "one million, two hundred forty-seven thousand, one hundred seventeen".