1165231 has 4 divisors (see below), whose sum is σ = 1233792. Its totient is φ = 1096672.

The previous prime is 1165223. The next prime is 1165273. The reversal of 1165231 is 1325611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1165231 - 2³ = 1165223 is a prime.

It is a super-2 number, since 2×1165231² = 2715526566722, which contains 22 as substring.

1165231 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1165199 and 1165208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165201) 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 3 ways as a sum of consecutive naturals, for example, 34255 + ... + 34288.

It is an arithmetic number, because the mean of its divisors is an integer number (308448).

2^1165231 is an apocalyptic number.

1165231 is a deficient number, since it is larger than the sum of its proper divisors (68561).

1165231 is an equidigital number, since it uses as much as digits as its factorization.

1165231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68560.

The product of its digits is 180, while the sum is 19.

The square root of 1165231 is about 1079.4586606258. The cubic root of 1165231 is about 105.2294603935.

The spelling of 1165231 in words is "one million, one hundred sixty-five thousand, two hundred thirty-one".