1145647 has 4 divisors (see below), whose sum is σ = 1213056. Its totient is φ = 1078240.

The previous prime is 1145623. The next prime is 1145659. The reversal of 1145647 is 7465411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7465411 = 97 ⋅76963.

It is a cyclic number.

It is not a de Polignac number, because 1145647 - 2¹⁹ = 621359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145747) 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, 33679 + ... + 33712.

It is an arithmetic number, because the mean of its divisors is an integer number (303264).

2^1145647 is an apocalyptic number.

1145647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1145647 is a deficient number, since it is larger than the sum of its proper divisors (67409).

1145647 is an equidigital number, since it uses as much as digits as its factorization.

1145647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67408.

The product of its digits is 3360, while the sum is 28.

The square root of 1145647 is about 1070.3490085014. The cubic root of 1145647 is about 104.6365970843.

The spelling of 1145647 in words is "one million, one hundred forty-five thousand, six hundred forty-seven".