1161911 has 8 divisors (see below), whose sum is σ = 1233024. Its totient is φ = 1092960.

The previous prime is 1161893. The next prime is 1161929. The reversal of 1161911 is 1191611.

It is an interprime number because it is at equal distance from previous prime (1161893) and next prime (1161929).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161911 is a prime.

1161911 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (154128).

2^1161911 is an apocalyptic number.

1161911 is a deficient number, since it is larger than the sum of its proper divisors (71113).

1161911 is a wasteful number, since it uses less digits than its factorization.

1161911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its digits is 54, while the sum is 20.

The square root of 1161911 is about 1077.9197558260. The cubic root of 1161911 is about 105.1294246817.

The spelling of 1161911 in words is "one million, one hundred sixty-one thousand, nine hundred eleven".