1145865 has 24 divisors (see below), whose sum is σ = 2134080. Its totient is φ = 523488.

The previous prime is 1145849. The next prime is 1145873. The reversal of 1145865 is 5685411.

It is not a de Polignac number, because 1145865 - 2⁴ = 1145849 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45 + ... + 1514.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2^1145865 is an apocalyptic number.

1145865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145865 is a deficient number, since it is larger than the sum of its proper divisors (988215).

1145865 is a wasteful number, since it uses less digits than its factorization.

1145865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581 (or 1574 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1145865 is about 1070.4508395998. The cubic root of 1145865 is about 104.6432336054.

The spelling of 1145865 in words is "one million, one hundred forty-five thousand, eight hundred sixty-five".