1161189 has 16 divisors (see below), whose sum is σ = 1780800. Its totient is φ = 746928.

The previous prime is 1161169. The next prime is 1161203. The reversal of 1161189 is 9811611.

1161189 = 112² + 113² + ... + 169².

It is not a de Polignac number, because 1161189 - 2¹³ = 1152997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161169) 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 15 ways as a sum of consecutive naturals, for example, 42 + ... + 1524.

It is an arithmetic number, because the mean of its divisors is an integer number (111300).

2^1161189 is an apocalyptic number.

It is an amenable number.

1161189 is a deficient number, since it is larger than the sum of its proper divisors (619611).

1161189 is a wasteful number, since it uses less digits than its factorization.

1161189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1515 counting only the distinct ones).

The product of its digits is 432, while the sum is 27.

The square root of 1161189 is about 1077.5847994474. The cubic root of 1161189 is about 105.1076447083.

The spelling of 1161189 in words is "one million, one hundred sixty-one thousand, one hundred eighty-nine".