1145839 has 4 divisors (see below), whose sum is σ = 1165320. Its totient is φ = 1126360.

The previous prime is 1145831. The next prime is 1145843. The reversal of 1145839 is 9385411.

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 1145839 - 2³ = 1145831 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1145839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9652 + ... + 9769.

It is an arithmetic number, because the mean of its divisors is an integer number (291330).

2^1145839 is an apocalyptic number.

1145839 is a deficient number, since it is larger than the sum of its proper divisors (19481).

1145839 is an equidigital number, since it uses as much as digits as its factorization.

1145839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19480.

The product of its digits is 4320, while the sum is 31.

The square root of 1145839 is about 1070.4386951152. The cubic root of 1145839 is about 104.6424421379.

The spelling of 1145839 in words is "one million, one hundred forty-five thousand, eight hundred thirty-nine".