1156217 has 2 divisors, whose sum is σ = 1156218. Its totient is φ = 1156216.

The previous prime is 1156171. The next prime is 1156229. The reversal of 1156217 is 7126511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142761 + 13456 = 1069^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156217 - 2⁸ = 1155961 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156192 and 1156201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578108 + 578109.

It is an arithmetic number, because the mean of its divisors is an integer number (578109).

2^1156217 is an apocalyptic number.

It is an amenable number.

1156217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156217 is an equidigital number, since it uses as much as digits as its factorization.

1156217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 1156217 is about 1075.2753135825. The cubic root of 1156217 is about 104.9574128124.

The spelling of 1156217 in words is "one million, one hundred fifty-six thousand, two hundred seventeen".