1156109 has 2 divisors, whose sum is σ = 1156110. Its totient is φ = 1156108.

The previous prime is 1156097. The next prime is 1156121. The reversal of 1156109 is 9016511.

It is a balanced prime because it is at equal distance from previous prime (1156097) and next prime (1156121).

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 484 = 1075^2 + 22^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578054 + 578055.

It is an arithmetic number, because the mean of its divisors is an integer number (578055).

2^1156109 is an apocalyptic number.

It is an amenable number.

1156109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156109 is an equidigital number, since it uses as much as digits as its factorization.

1156109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 1156109 is about 1075.2250927131. The cubic root of 1156109 is about 104.9541447542.

The spelling of 1156109 in words is "one million, one hundred fifty-six thousand, one hundred nine".